# FUNCTION FOR TOTAL COST C(P_0, t, r) = round((P_0 * 1 year) / r * (e^(r * (t / 1 year)) - 1), 2); # HOW TO USE THIS FUNCTION # C ( PRICE / PERIOD , TOTAL TIME , ANNUAL INFLATION ) # EXAMPLE "Total cost of a monthly subscription after time with inflation:" SubA = C(5.00 / month, 30 years, 3.0%) SubB = C(10.00 / month, 30 years, 5.0%) SubC = C(19.99 / month, 30 years, 3.0%) SubA + SubB + SubC