Fixed. Variable total cost functions F is the total cost to a firm of its short- run fixed inputs(固定投入).F,the firm's fixed cost, does not vary with the firm' s output level Cly) is the total cost to a firm of its variable inputs(可变投入)when producing y output units. Cyy)is the firm's variable cost function Cyy) depends upon the levels of the fixed inputs
Fixed, Variable & Total Cost Functions F is the total cost to a firm of its shortrun fixed inputs （固定投入）. F, the firm’s fixed cost, does not vary with the firm’s output level. cv (y) is the total cost to a firm of its variable inputs （可变投入）when producing y output units. cv (y) is the firm’s variable cost function. cv (y) depends upon the levels of the fixed inputs
Fixed. Variable Total cost functions cly)is the total cost of all inputs, fixed and variable, when producing y output units. cly)is the firm's total cost function c(y)=F+Cy(y)
Fixed, Variable & Total Cost Functions c(y) is the total cost of all inputs, fixed and variable, when producing y output units. c(y) is the firm’s total cost function; c(y) = F + cv (y)
y
y $ F
Cyy) y
y $ c v (y)
Cyy) y
y $ Fcv (y)