Betty took her friends bowling. they rented 4 lane. 10 people need rent shoes and 4 people are members. lane rentals are 9.75 for nonmembers and 7.50 for members. shoe rental is 3.95 for nonmembers and 2.95 for members. what is the total cost for the party?

First there are two groups, members and non-members, so you know that there are 4 people who are members, if you subtract 4 from ten that would mean 6 people are non-members. now, for the cost of the members would be (7.50 × 4) + (2.95 × 4) = 41.8$
for the non-member group or would be (9.75 × 6) + (3.95 ×6) = 82.2$ now add 41.8 to 82.2 which equals 124.0$ in total

D.is the correct answer to the question