Convert 13.3mmx12.4mmx15.2mm into si units. find the volume of the block and give answer in standard form

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?