Find athe costb the average cost c the marginal cost ata pro

Find a.)the cost,b.) the average cost, c.) the marginal cost ata production of level of 1000 units. c(x)=45+x/2+x^2/560.

Please show your work. thank you

put x = 1 to find the cost a) C(1) = 45+1/2+1/560 = 45.5 b) avg cost = (45000 + 1000^2/4 + 1000^3)/(560*3) /1000 = 595.413 c) marginal cost = 1/2 + 2000/560 = 4.07