Final answer:
The cost of the repair and sales tax combined at Store B cannot be determined without more information.
Step-by-step explanation:
To find the cost of the repair and sales tax combined at Store B, we need to know the cost of the repair and the sales tax rate. Without that information, it is not possible to determine the exact cost. The options provided - a) $1200, b) $1350, c) $1444.50, d) $2295 - are all potential answers, but without more information, we cannot determine which one is correct.