Susie and Omar Operate a Hair-Dressing Business

Susie and Omar operate a hair-dressing business.They are about to start offering a hair-straightening service using imported Japanese technology, and they need to set a selling price for the service that incorporates their usual 60% profit mark-up on variable costs.The materials involved in the process cost £3.30, and a royalty is payable to the holder of the Japanese patent of £2 per treatment.The treatment requires the attention of a senior stylist whose hourly rate of pay is £8.50.Each treatment requires 3.5 hours of the stylist's time. What is the projected selling price for one hair-straightening treatment (to the nearest £) ?

A) £53
B) £56
C) £88
D) £83