To find out how much money the bookstore has left from May and June sales after subtracting expenses, we first need to calculate the total sales for both months and then subtract the expenses.
- Total sales in May: $6,910
- Total sales in June: $5,288
Total sales for two months: \[ 6,910 + 5,288 = 12,198 \]
- Total expenses for the two months: $2,780
Now, subtract the expenses from the total sales: \[ 12,198 - 2,780 = 9,418 \]
Therefore, the bookstore has $9,418 left after subtracting expenses.
The correct answer is $9,418.