10bii Cash Calculator Help

Thanks for using the 10bii Cash Calculator by In A Day Development!

If you have any questions which aren't answered by this Help page or have any suggestions to make the app better, please contact us at theteam@inadaydevelopment.com

Checkout our Video Tutorials as well!

Basic Features
Time Value of Money - Loans, Yields, N, I/YR, PV, PMT, FV
Margin and Markup Calculations
Differences Between App and original HP10bII Calculator
Uneven CashFlows - NPV, IRR/YR
K - Constant Calculations

Basic Features

Cursor

The cursor ( _ ) is visible when you are entering a number.

Clearing the Calculator

When the cursor is on, erases the last digit you entered. Otherwise, clears the display and cancels the calculation. While you are entering a number, pressing clears it to zero. Otherwise, clears the display of its current contents and cancels the current calculation.

Clearing Memory

Clears all memory. Does not reset modes. *
Clears statistical memory.
* Modes on your calculator are number of payments per year, Begin and End, and the display formats.

Shift Key

Most of the calculator's keys have a second or "shifted" function printed in orange on the key. The orange shift key is used to access these functions. When you press , the keys change their images to indicate that the shifted functions are active. To turn the shifted functions off, press again. For example, press followed by to multiply a number in the display by itself.

Statistics Key

Six of the calculator's keys have a third function printed in blue on the key. These are the summary statistics functions. The statistics key is used to access the summary statistics from the statistics memory registers. When you press , the keys change their images to indicate that the statistics functions are active. To turn the statistics functions off, press the again. For example, press followed by to recall the sum of the x values entered.

SWAP Key

The Swap key can be used in three ways. Pressing exchanges the following:

The last two numbers that you entered; for instance, to change the order of division or subtraction.
The results of functions that return two values.
The x- and y-values when using statistics.

Math Functions

One-Number Functions

Math functions involving one number use the number in the display, as in arithmetic calculations. For example, pressing displays the answer 9.45 because the calculated the square root of the number 89.25 in the display.

Two-Number Functions

When a function requires two numbers, the numbers are entered like this: number1 number2 followed by the operand. For example, pressing displays the answer 70.59 because the keystrokes calculated the percent change between 17 and 29.

Specifying Displayed Decimal Places

When you start the 10bii Cash Calculator for the first time, numbers are displayed with two decimal places and a period as the decimal point. The display format controls how many digits appear in the display.

To specify the number of displayed decimal places:

Press
Enter the number of digits (0 through 9) that you wish to appear after the decimal point.

For example, in a cleared display, pressing will result in the display 0.0000 showing four decimal places.

Interchanging the Period and the Comma

To switch between the period and comma (United States and International Display) used as the decimal point and digit separator, press . For example, one million can be displayed as 1,000,000.00 or 1.000.000,00 .

Rounding Numbers

The calculator stores and calculates using double precision floating point numbers. When full accuracy is not desirable, use to round the number to the displayed format before using it in a calculation. Rounding numbers is useful when you want the actual (dollars and cents) monthly payment.

Margin and Markup Calculations

The 10bii Cash Calculator can calculate cost, selling price, margin, or markup. Margin is markup expressed as a percent of price. Markup calculations are expressed as a percent of cost. To see any value used by the Margin and Markup application, press and then the key you wish to see. For example, to see the value stored as , press . Margin and Markup share the same storage register. For example, if you store 20 in , then press , you will see 20.00 displayed.

Margin Calculations

Example.

Crazy Eddie's Electronics purchases TVs for $255. The televisions are sold for $300. What is the margin?

Press to store 255.00 in Cost.
Press to store 300.00 in Price.
Press to calculate Margin. The display should read 15.00 as your percent margin.

Markup on Cost Calculations

Example.

The standard markup on costume jewelry at Sparkle-tastic is 60%. They just received a shipment of chokers costing $19.00 each. What is the retail price per choker?

Press to store 19.00 in Cost.
Press to store 60.00 in Markup.
Press to calculate Price. The display should read 30.40 as your price.

Using Margin and Markup Together

Example.

A food cooperative buys cases of canned soup with a cost of $9.60 per case. If the co-op uses a 15% markup, for what price should it sell a case of soup? What is the margin?

Press to store 9.60 in Cost.
Press to store 15.00 in Markup.
Press to calculate

Differences Between App and original HP10bII Calculator

We try to remain true to the original calculator created by HP, but improvements in hardware and graphics allow us to provide cleaner and easier to use interfaces. There are 5 big differences. In our app...

You can enter a multi-term calculation and see the entire calculation as you type. When you touch , the entire equation will be evaluated.
You can enter Uneven Cash Flow information as well as Statistical (x,y) points in an easy-to-use, visual format.
You can easily see Cash Flow graphs for standard loan amortizations or for Uneven Cash Flows as well as line graphs of your Statistical (x,y) points.
You can easily see a complete amortization schedule with interest payments, principle and total paid information.
You can use Easy Modes! (iPhone/iPad/iPod Touch Only) For those not familiar with the complex functions of the 10bii, you can answer many common financial questions with our Easy Modes.

Time Value of Money - N, I/YR, PV, PMT, FV

The Time Value of Money (TVM) keys are used for compound interest calculations that involve regular, uniform cash flows -- called payments. Once the values are entered you can vary one value at a time, without entering all the values again. To use TVM, several prerequisites must be met:

The amount of each payment must be the same. If the payment amounts vary, use the instructions in the next section for Uneven Cash Flows.
Payments must occur at regular intervals.
The payment period must coincide with the interest compounding period. (If it does not, convert the interest rate using the , , and keys.)
There must be at least one positive and one negative cash flow.

A summary of the TVM keys:

	The number of payments or compounding periods.
	The annual nominal interest rate.
	The present value of future cash flows. PV is usually an initial investment or loan amount and always occurs at the beginning of the first period.
	The amount of periodic payments. All payments are equal, and none are skipped; payments can occur at the beginning or end of each period.
	The future value. FV is either a final cash flow or compounded value of a series of previous cash flows. FV occurs at the end of the last period.
	Stores the number of periods per year. The default is 12. Reset only when you wish to change it. (This key is the shifted version of )
	Optional shortcut for storing N: Number in display is multiplied by the value in P/YR and stores the result in N. (This key is the shifted version of )
	Switches between Begin and End mode. In Begin mode, the BEGIN annunciator is displayed on the calculator display.
	Calculates an amortization table.

Uneven CashFlows - NPV, IRR/YR

The Cash Flow functionality is used to solve problems where cash flows occur over regular intervals but are of varying amounts. You can also use Cash Flow calculations to solve problems with regular, equal, periodic cash flows, but these situations are handled more easily by using the TVM functionality.

Touch to bring up the Cash Flow editor window. You will be able to add new Cash Flows, delete Cash Flows, reorder Cash Flows all in an easy to use interface. Check out the Video Tutorials below to see an example of using the Uneven Cash Flow functionality.

K - Constant Calculations

Use to store a number and arithmetic operator for repetitive calculations. Once the constant operation is stored, enter a number and press . The stored operation is performed on the number in the display.

Keys	Operation
number	Stores "+ number" as constant.
number	Stores "- number" as constant.
number	Stores "X number" as constant.
number	Stores "÷ number" as constant.
X value	Stores "y^{x value}" as constant.
number	Stores "+ number%" as constant.
number	Stores "- number%" as constant.
number	Stores "X number%" as constant.
number	Stores "÷ number%" as constant.

Example: Calculate 5+2, 6+2, and 7+2.

Keys:	Display:	Description:
	2.00	Stores "+ 2" as constant.
	7.00	Adds 5 + 2.
	8.00	Adds 6 + 2.
	9.00	Adds 7 + 2.

Example: Calculate 10+10%, 11+10%, and 25+10%.

Keys:	Display:	Description:
	1.00	Stores "+ 10%" as constant.
	11.00	Adds 10% + 10.
	12.10	Adds 10% + 11.
	27.50	Adds 10% + 25.

Example: Calculate 2³ and 4³.

Keys:	Display:	Description:
	3.00	Stores "y³" as constant.
	8.00	Calculates 2³.
	64.00	Calculates 4³.