pTinspire Finance Solver Introductionp ptodays article is going to be a brief introduction to the finance solver on the tinspire cash calculator so to access this finance solver which is a great tool for solving problems related to business related mathematics we first go to menu and then we go to eight finance and the very first one the finance solver this will open up a window that has a whole series of menus or a whole series of boxes to fill in and now n represents the number of payments that are being made for this example lets just say its tap 10 the interest rate and this is important here the interest rate is always always always going to be given as a percentage per a number per year so we are not adjusting it for the time period lets say our interest rate is 4 per year PV that is the present value of the loan in the formulas that weve seen PV is equivalent to P so its the value that the loan is essentially at the start and with PV you have to be very careful PV could be positive or it could be negative the difference between this is to think about where the money is going if you have put money into an account you no longer have direct access to the money it has left your hand thus PV will be negative however if you are receiving a loan if someone is giving you money the money will get put into your hand and you can now spend it in that case PV will be positive for our case lets assume youre putting money into an account so be PV is negative lets say 1, 000 the next one PMT and you can just scroll through these different menus with the tab button and it just goes all the way through to go backwards you do shifttab and that will go back the other direction so PMT PMT is the amount if were dealing with an annuity or a reducing balanced loan how much are you paying in or receiving on a regular basis the rules for positive or negative are the same for this as they are for PV so Im going to assume that Im trying to build up an annuity and Im depositing lets say 100 a month or a week whatever it is the next one is FV future value so the future value is what the value in the account will be after all of our payments so after n payments and n periods what will happen so the future value in this case here lets say that thats what we want to find so Im just going to leave that blank Im not going to touch that just yet the next one that I have is ppy which as you can see at the bottom is payments per year so how many times is the interest being for how many payments pardon me are you making per year lets assume here that were making our monthly payment of 100 once a month that means there will be 12 payments per year with this we can also assume and the count the program will often assume for us that the number of payments per year will be equal to that next value which is the number of compounding periods per year it automatically adjusts so that p py and c py are the same and thats how were going to leave it for all of our examples we can assume the payment is the same or is made at the end of the period now we go back to FV and as it says at the bottom press ENTER to calculate FV is now positive because 2048 dollars and 97 cents can be withdrawn and that money would now be in our hand available to spend after 10 payments of 100 with this initial amount and this interest rate compounded on a monthly basis one other neat trick here is you can see down at the bottom that the Finance solver info is stored this means that if weve got some of these numbers that we want to do other calculations with its very easy to do so lets say I want to do something with this future value Im going to escape to get out of the finance solver so escape just up in the top left hand corner and now Im going to start typing T V M T V M is the name of the solver and as soon as I press T V m dot youll notice that a list of variables comes up weve got CP y FV I n PMT PMT p py and pv all of those represent the same values of the variables that we used in the program so Im going to test what PMT is I just go to PMT press ENTER and PMT as we should expect is negative 100 lets do another one the future value TV m dot FV enter its bolded which means that weve defined this variable press enter 2048 dollars and 97 cents so that has been an introduction to the finance solver program on the TI Nspire kaz calculatorp

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