The HP50g as a financial tool (II)

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The HP50g as a financial tool (II)

Let’s continue with our aim to convert our powerful HP 50g in a FINANCIAL tool.

We ended last time introducing what would be our main tool: the CST (custom) menu. We proceeded them to fill the 3 first positions with off-the-shelf percentage functions: %, %ch and %T. In my experience, these are the most used financial-specific functions in your daily work.

{% %CH %T DDAYS DATE+ BUS IVA TOTAL CAMB MKP%}


In level 2, you put the number you will take the percentage from; or the initial value, if you want to calculate the percentage of change; or the total;

Secondly, there comes the date calculations, in order to know when payments are due, or to plan for maturities of investments. These are DDAYS and date+. Remember to set your preferred date format in the flag screen. It’s flag xx.

In DDAYS you write 2 dates in both levels, and it calculates the number of days in between; and in date+, you put a date and a number, and it will give you the date adding that number of days to the other date. It works with negative numbers as well.

Now for the other functions: the key BUS stores the following short program: << 79 menu >>. This one leads to a submenu with TVM functions, as shown:

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The use differs a little bit from the HP17 - HP19 menus. You need to enter a number and press the variable you want to store it; this is equal to the above calculators; however, to SOLVE for a given variable, you need to press left-arrow and the variable you want to calculate. Same behavior applies to all solvers below.

the IVA (called after the name for VAT in Spain) calculates a % mark up on cost; this is stored as the following program. The last part of it leads to a menu page, where you take the SOLVR option and enter into the soft menu screen.

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TOTAL applies the formula below.

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CAMB is the Spanish word for Change. Same rules apply.

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Next day we will talk about the IRR calculation...

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