short-run eost junetion This is a eontinuation of problem 9 above. Ralph's short-run eost eurve is given by CSR(q) = 1,200 + 860q - 45q2 + 1.2q3.

aJ Detennine Ralph's fixed, total variable and average variable eost.
bJ Detennine Ralph's short-run total eost, average eost, marginai eost and ineremental eost for eaeh integer value of q between 0 and 30. (Again, let ineremental eost be the eost of one additional unit.)

eJ Plot and intetpret Ralph's long-run and short-run average eost.

dJ Plot and intetpret Ralph's long-run and short-run marginai eost.

AppendixLO1