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# I need help calculating a specific problem on this calculator.

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HP 10bII+ Financial Calculator

I need to know how to us the calculator to solve this specific problem.  I want to know how much money I will have if I deposit \$100 in a fund every month for 40 years and I get 12% interest compounded monthly.  The answer should be \$1,188,242.

Also, if I invest \$2,000 one time and I get 12% interest compounded monthly, and I invest it for 30 years how much money will I have.  I need to know the steps for calculating this problem also.  The answer for this problem should be \$71,890

Thank you very much for your prompt attention.   My email address is [Personal Information Removed]

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Although I work for the HP calculator group as a head developer of the HP Prime, the views and opinions I post here are my own.
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Your answer was of no help.  I looked through the whole Quick start and it did not tell me how to solve my problem.  Yes is is a basic problem, why does the book not tell me how to do it?  Please tell me how to solve my problem.

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@bjtcr5 wrote:

I need to know how to us the calculator to solve this specific problem.  I want to know how much money I will have if I deposit \$100 in a fund every month for 40 years and I get 12% interest compounded monthly.  The answer should be \$1,188,242.

Also, if I invest \$2,000 one time and I get 12% interest compounded monthly, and I invest it for 30 years how much money will I have.  I need to know the steps for calculating this problem also.  The answer for this problem should be \$71,890

Thank you very much for your prompt attention.   My email address is [Personal Information Removed]

First problem:

(1) [down-shift] [C] (C ALL) and watch the display as you press it.

(2) If 12 P_Yr was not displayed, press 12 [down-shift] [P/YR] (note: that's on the PMT key, not the N key).

(3) 100 [+/-] [PMT]

(4) 40 [down-shift] [N] (this executes *P/YR and stores 40 * 12 into N)

(5) 12 [I/YR]

(6) If the BEG annunciator is not lit, press [down-shift] [Beg/End]

Second problem:

(1) [down-shift] [C] (C ALL) and watch the display as you press it.

(2) If 12 P_Yr was not displayed, press 12 [down-shift] [P/YR] (note: that's on the PMT key, not the N key).

(3) 2000 [+/-] [PV]

(4) 12 [I/YR]

(5) 30 [down-shift] [N] (this executes *P/YR and stores 30 * 12 into N)