One way can be 8x(6-4+2).
Bessy has 32 dollars and Bob has 4 dollars before "Bob" earns 4 dollars and then Bessy has 32 dollars and Bob has 8 dollars after Bob gets 4 dollars.
Answer:
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Commission formula : C = prn
C = commission
p = price of one item <===
r = commission rate
n = number of items sold