8x27 using distributive property and mental math

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Asap! i'm not good math and i'm lost.