Total cost is the cost of by a firm. total fixed cost is the cost of the - the cost of and total variable cost is the cost of the - the cost of
a. the quantities of goods produced; firm's fixed quantities; land; labor; capital; firms's variable quantities; labor
b. the interest on capital used; firm's fixed rate of interest; physical capital; financial capital; entrepreneurship; firm's variable rate of interest; financial capital
c. the output produced; firm's fixed output; primary; intermediate; final output firm's variable output; primary goods and services
d. all the factors of production used;