Gina fox has started her own company, Foxy Shirts, which manufactures imprinted shirts for occassions. Since she has just begun this operation, she rents the equipment from a local printing shop when necessary. The cost of using the equipment is $350. The materials used in one shirt cost $8 and Gina can sell these for $15 each.

(a) If Gina sells 20 shirts, what will her total revenue be? what will her total variable cost be?

(b) How many shirts must Gina sell to break even? what is the total revenue for this?

Please show formulas and calculations