Joe's fun and sun rents beach chairs. the store rented 300 beach chairs each month in april and in may. the store rented 600 beach chairs each month from june through september. how many beach chairs did the store rent during the 6 months?

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.