Answer:
Interest will be $855 x 10 years= $8,550
Explanation:
Interest
6÷100=0.06
0.06x14,250=$855
$855x10=$8,550.
How much to have paid back
At the end of 10years $8,550 would have been paid as interest
Total sum will be $14,250+$8,550=$22,800 to be paid back.
I think the answer is called enriching but i might be wrong.
If he was the first to say he wanted the product and the seller wants to sell it as fast as possible than yes. But not technically it would be a kind of verbal understanding and agreement.