For my work, I'm creating a payment plan calculator. The sheet uses the payment formula, and based on a specific interest rate, current loan balance, and duration, it calculates monthly payments for the customer. What I'm looking for is a way to add a range to this. For example, based on my current sheet, let's say the customer's regular payment comes out to be 246.12 a month. I want a formula that will calculate an amount that Is +/- "x" amount of dollars for the given monthly payment. So, let's say my threshold is +/- $50.00; I'd have cell A giving the montly payment of 246.12, and then cell B would should something like 196.12-296.12. Any thoughts?
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