Jack's Trimmers, Inc. produced 300 hand-held lawn trimmers. Total fixed costs were $29,000 and total variable costs were $37,500. a. If 400 lawn trimmers were produced, what would the total variable costs be? b. What is the fixed cost per lawn trimmer, assuming 400 trimmers are produced? c. What is the total cost per lawn trimmer, assuming 400 trimmers are produced