MArginal cost is the adjustment in all out cost that emerges when the amount created changes by one unit.(In another word subordinate of cost wrt unit) So we coordinate to get Cost work ∫30 600/0.3q+5 (dq) 0 we get 9798.66 from joining. We add that to settle cost 2059.23+2200=4259.24 So 4259.24 is the cost. Income from offering the bicycle is 205*30=6150 and Profit=Revenue-Cost 6150 - 4259.24=1890.76 Presently Marginal Profit MArginal benefit is the term used to allude to the contrast between the minor cost the peripheral income for delivering one extra unit of creation. Marginal Profit=Marginal Revenue-Marginal Cost Marginal Cost=600/0.3q+5. We should connect to 31 to get 41.958 Revenue= 205q