+108 Alicia bought diaries at $3 each and sold them at $8 each. Customers who bought 2 diaries from her were given one diary free. At the end of the sale, Alicia had given away 150 copies of diaries and made $1 235. Find the number of customers who had bought only one diary.
+37146
If she gave away 150, that means there were 150 sets of 3
150 *16 = 150*16 = 2400 - 450*3 = 1050 (450 *3 is the cost of goods sold)
1235- 1050 = 185 at 5 profit each = 37 single copy buyers
