TB MC Qu. 5-35 Which of the following is a mixed cost?

Which of the following is a mixed cost?

A cost that is $32.00 per unit when production is 80,000, and $32.00 per unit when production is 128,000. A cost that is $32.00 per unit when production is 80,000, and $40.00 per unit when production is 128,000. A cost that is $32.00 per unit when production is 80,000, and $26.00 per unit when production is 128,000. A cost that is $64.00 per unit when production is 80,000, and $64.00 per unit when production is 128,000.