Answer:
A.57.99 B.70.39 C 45.96
Step-by-step explanation:12.4 x 4 + 8.39 = 57.99 for Part A For B, this is 12.4x5+8.39=70.39. C is 12.4+8.39x4=45.96 12.4 + 8.39 x 5 =54.35
I'm not sure whether I should group the responses because there isn't much context, but I hope this helps.