need help please

The men's a capella group and women's a capella group at the local university use the same rehearsal space. They get a better deal on the space by renting rehearsal time in consecutive 2. hour blocks, for a total cost of $210 for 4 hours, The women's group has a longer tenure at the university and previously paid $117 for its 2 -hour session. Using the incremental method and considering the women's group as the first-ranked user, how much of the total cost would be allocated to each group