Final answer:
The insurance company's payment is $1,640. Carol's total cost is $660.
Step-by-step explanation:
To calculate the insurance company's payment, we first subtract the deductible from the total bill.
In this case, the deductible is $250, so the amount to be covered by the insurance is $2,300 - $250 = $2,050.
Now we need to find 80% of $2,050, which is $2,050 * 0.8 = $1,640.
Therefore, the insurance company's payment is $1,640.
Carol's total cost can be found by subtracting the insurance company's payment from the total bill.
So, $2,300 - $1,640 = $660.
Thus, Carol's total cost is $660.