Sam's Souvenirs, Inc. sells souvenirs for $25 each. Sam's pays rent of $155 per month. Its raw materials cost $8 and its direct labor costs $6 for each souvenir. Two of Sam's recent electrical utility bills were as follows: Electric Utility Bills Month May June a. What is the mixed cost? production output 15 25 b. What is the fixed portion of mixed cost? c. What is the variable portion of mixed cost? d. What is the total fixed cost? e. What is the total variable cost? cost ($) 50 60 f. What is her breakeven point, in number of tricycles (per month)?