The total revenue at the 7th and 8th unit will be $1155 and $1280 respectively while the marginal revenue is $125.
From the complete information, the total revenue at the 7th unit will be:
= 165 × 7 = $1155
The total revenue at the 8th unit will be:
= 160 × 8 = $1280
The marginal revenue will be:
= $1280 - $1155 = $125
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