John Gray brought a basic car for $8,250.00, with options that cost $324.00. There's a 6% sales tax in his state and a combined $50.00 license and registration fee. What was John's total cost?

8250+324=8574

find tax then add license and register fee

8574*0.06=514.44

total is 8574+514.44=9088.44

then add 50

9138.44

total is $9138.44

Cost of basic car = $8250

Optional cost = $324

Total cost of basic car and optional items for John = (8250 + 324) dollars

= 8574 dollars

Then

Percentage of sales tax = 6%

Amount of sales tax = 8574 * (6/100) dollars

= 514.44 dollars

License and registration fee combined = $50

Then total cost of John in regards to buying the car = 8574 + 514.44 + 50

= 9138.44 dollars

$9,138.44 is the correct option in regards to the question given.