Answer:
0.06 per spike set sold
Step-by-step explanation:
The computation of the variable marketing cost per spike set is shown below:
Variable cost per spike set = (High total marketing cost - low total marketing cost) ÷ (High sales volume - low sales volume )
= ($83,092 - $72,871) ÷ (561,080 - 390,728)
= $10,221 ÷ 170,352
= 0.06 per spike set sold
Hence, the variable marketing cost per spike set is $0.06