Gina Fox has started her own company, Foxy Shirts, which manufactures imprinted shirts for special oc- casions. 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.If Gina sells 20 shirts, what will her total revenue be? What will her total variable cost be?