Julia Child Company sells baby car seats to retailers for an average of $85 each. The variable cost of each car seat is $48 and monthly fixed selling costs total $6,000. Other monthly fixed costs of the company total $7,000. Julia Child Company sells baby car seats to retailers for an average of $85 each. The variable cost of each car seat is $48 and monthly fixed selling costs total $6,000. Other monthly fixed costs of the company total $7,000