Arah mailed her computer to store b for repairs. her bill was: total cost of computer repair = $1,444.50 shipping = 2 percent of total cost if sarah wanted to include a 15 percent gratuity, based on the total cost of the computer repair, excluding shipping, how would you find her new total cost? arah mailed her computer to store b for repairs. her bill was: total cost of computer repair = $1,444.50 shipping = 2 percent of total cost if sarah wanted to include a 15 percent gratuity, based on the total cost of the computer repair, excluding shipping, how would you find her new total cost?