Mighty Muffler operates an automobile service facility. The table below shows that cost incurred during a month when 600 mufflers were replaced.

Number of muffler replacements

Total costs: 500 600 700

Fixed costs A $8,400 C

Variable costs B 24,000 D

Total costsE $32,000 F

Costs per muffler replacement:

Fixed costs G HI

Variable cost J K L

Total cost per muffler replacement M N O

Fill in the missing amounts as labeled A, B, C, D, E, F, G, H, I, J, K, L, M, N, O.