Cost of Competitive Firm In Vienna, there is a competitive market for the production of upright pianos. David's piano production rm can make at most six pianos per week. Quantity Fixed Cost ($} Variable Cost ($) Total Cost ($} Marginal Cost ($} 1 5000 2 2000 11000 3 18000 4 3000 5 37000 6 45000 Complete the four cost columns in the table above. It the market prioe oi pianos is $8000 this week, how many pianos should David's lin'n produce to maximise prot? What would David's prot be this week? $