
Nicklaus H. answered 09/06/19
PhD Student in Neuroscience, 10+ Years Tutoring Experience
You would use the equation C = P(1+r) where C is the total cost,P is the principal amount, and r is the rate of interest as a decimal.
In this case, C is what you are solving for, P is 177, and r would be .35. Since it is not compounding interest over time, the equation is simplified to the above form. Plug in your numbers and solve for C.