Which of the following is a variable cost? Multiple Choice A cost that is $6,200 when production is 31,000, and $12,400 when production is 34,200 A cost that is $6,200 when production is 31,000, and $6,840 when production is 34,200, A cost that is $6,200 when production is 31000, and $6.200 when production is 34,200. A cost that is $12,400 when production is 31,000, and $12,400 when production is 34,200