Answer:
1630
Step-by-step explanation:
You want to know what Martin paid to cover 1650 in doctor bills when his insurance pays 80% after a deductible of 500 has been met.
When insurance pays 80% of the amount over 500, Martin pays the other 20%. Martin's share of the bill is ...
500 + 0.20(6150 -500)
= 500 +0.20(6150) -0.20(500) = 400 +0.20(6150)
= 400 +1230 = 1630
Martin paid 1630 in all, including the deductible.