At a fruit stall, 384 apples were sold in the morning and ⁵₇ of the remaining apples were sold in the afternoon. As a result, the number of apples left became ¹₅ of the total number of apples at first. Given that the apples were sold at $3.50 in packs of eight apples, how much did the fruit stall receive from the sale of the apples in the afternoon?
Fraction of the remaining apples left
= 1 - ⁵₇
= ²₇

Make numerators the same.
²₇ of remaining apples = ¹₅ of total apples
²₇ of remaining apples = ²₁₀ of total apples

10 u - 7 u = 384
3 u = 384
1 u = 384 ÷ 3 = 128

Number of apples sold in the afternoon
= 5 u
= 5 x 128
= 640

Number of packs of eight apples sold in the afternoon
= 640 ÷ 8
= 80

Amount received for apples sold in the afternoon
= 80 x 3.50
= $280

Answer(s): $280