On friday, a bowling alley made $842.72 from lane rentals and $412.38 from the concession stand. on saturday, their lane rentals were down by 1/8 but the concessions increased by 1/2 . what is the total amount that the bowling alley earned in lane rentals and concessions on friday and saturday?

On Friday, the bowling alley earned $842.72 from lane rentals. On Saturday, it earned 1/8 less. So, multiply 842.72 * .125 = $105.34 less money on Saturday. So, the total on Saturday was $842.72 - $105.34 = $737.38

It earned $412.38 on Friday concession. On Saturday, it earned 1/2 more. So, multiply $412.38 * 0.5 = $206.19 more on Saturday for a total of $412.38 + $206.19 = $618.57
grand total is 842.72 + 412.38 + 737.38 + 618.57 = 2,611.05

The answer to this question is c