A) $4,300. Profit = total revenue – total cost = (unit price x quantity sold) – (fixed cost + variable cost) = $18,000 – ($6200 + $7,500) = $4,300. The variable cost is the labor and materials for each kit ($5 + $45) times the number of kits sold (150 kits) or $50 x 150 = $7,500. The fixed costs are $1,000, $200, $500, and $4500=$6200. The profit is $4,300 for the month. More test answers on https://studyhippo.com/marketing-final-practice-questions/