Please help me solve this

Company Tulip manufactures a gadget that requires 1.2 hours of machining. Machine time is a bottleneck resource, due to the limited number of machines available. There are 8 machines available, and each machine can be used for up to 35 hours per week. The product is sold for RUB100 per unit and the direct material cost per unit is RUB47.2. Total factory costs are RUB12,300 each week. Calculate the return per factory hour