Sigma 10 and 1 4(1/4)^n-1

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Given abc find the values of x and y. in your final answer, include all of your calculations.

Drawing it out would be best can you me