This program allows the TI-85 to perform all the functions of a financial
calculator.  (PV, FV, PVI, FVI, NPV, IRR, PI, Payback periods, perpetuities)




Program created by Dan Watkins (goodman@brahms.udel.edu)
2718 Bytes

This program has many parts.  On the initial screen you have a menu and
descriptions of the menu contents are given on the screen.

F1 is Time Value of Money, if you hit this button, you will load an equation
into solver.  (Special thanks to the guys on the graph-ti list for helping
me with that equation).  
	
	PV = present value
	FV = future value
	Rate =  the interest rate or discount rate
	PMTY = the number of payments that occur within a year
	N = the number of years.
	PMT = annuity payment (payment is a fixed value)

Enter outflows of cash as negative numbers and inflows of cash as positive.
PMTY always has to be a number greater then or equal to 1.
If you are not using PV, FV or PMT enter a zero for the one not being used.

Now go back to the finance program, skip CFS, Add, and Old for now, we will
come back to it.

Hit F5 (MORE)

You will have the choices of either a Perpetuity equation (PV of PMTs to 
infinity).  Or the Continuous Compounding equation.  (Money that is earning
interest every second).

Goto Solver 

The perpetuity equation is easy to figure out.
The continuous compounding has a variable "EAR" That stands for the Effective
Annual Rate.

Go back to the finance program.

F2 (CFS) will allow you to enter cash flows.

You will be given the current time period and a prompt for group.  

If you say yes to group, you will be prompted for the number of cash flows.  
Enter the desired number and you will be prompted for the cash flow amount.  
Enter this number and the cash flow will be entered as many times as you 
entered for number of cash flows.  Notice you will see that the time period 
is now increased by the number of flows you entered.

If you say no to group, you will be prompted for the number of cash flows.  
Enter the desired number and you will be prompted for the cash flow amount.  
Enter this number and you will continue to be prompted for the cash flow 
amount until you are done (you will be done when you fill in as many cash
flows as you specified in the "number of cash flows" prompt.)  Notice you 
will see that the time period is now increased by the number of flows you 
entered.

Continue entering grouped or non-grouped cash flows until you are done.

WHEN YOU ARE DONE, ENTER "0" AT THE GROUP PROMPT.

You will encounter a menu that will give you the PV, FV, IRR, PI, and 
payback periods for the cash flow you just entered.  This is easy to figure
out....just pick what you want.

NOTE:  When running IRR, the numbers you see going down the screen is the
NPV of the list.  You should notice that the NPV is approaching zero.  When
then numbers hit zero, IRR will be displayed.  This is neat to have, because
you can see how long it is going to take for IRR to appear.  Also if NPV is
not approaching zero - something is WRONG....this should not happen.

After you picked what you want, you can go back to the finance main menu and
choose "Add to Old Cash Flows" (F3) to add more flows to your old list, or
choose "Use Old Cash Flows" (F4), which will send you back to the menu where
you can pick PV, FV, IRR, etc. for the last list you had entered.

EXTRA INFO:

The list that contains the Cash Flow list you enter in the cash flow routine
is stored to variable L2.

Discounted Cash flows are stored to variable L3.  (Except for a few 
functions).

When you utilize PV, FV, IRR, PI, and payback periods, the NPV equation is
stored to solver.

PV = The present value of the list in L2
L2 = the cash flows you entered
N = is a dummy variable and can be any number
Rate = the rate that is used to solve the for the PV of L2.  If PV is zero
       and the rate is solved for, this will give you IRR of L2.

If any problems occur with the program, feel free to contact me by e-mail.
I will be open to any suggestions also....

Thanks,    Dan Watkins