Answer:
The salesman earned $1,600 in commission.
Explanation:
$8,000 is 100% of the price, so
20% × 8000 = 1600 so
$1,600 is 20% of $8,000.
Multiply the amount of the sale by the commission rate:
8,000 x 0.20 = 1,600
He earned $1,600
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