I am trying to figure out a function for interest only payments. If it is a
$10,000 loan for 30 years with a 5% interest rate, what function should I use
to figure out what the monthly payment would be??

on another task, how would I get it to give me a positive amount for the
monthly payment instead of a negative amount. I understand the whole cash
flow thing but if I am using this as a mail-merge type thing I do not really
want it to print out negative numbers for a payment amount on letters going
to potential customers.

Thank you very much in advance.