Lincoln Middle School had a canned food drive. The 6th graders brought in 5.75 boxes of canned food, the 7th graders brought in

The cumulative quantity of canned food collected by the three grades totals 17.63 boxes. To determine this total, we need to sum the amounts contributed by each grade, attentively accounting for the decimal values. The contribution by sixth graders is 5.75 boxes, the seventh graders contributed 6.5 boxes, and the eighth graders brought in 7/1.3 boxes. We can convert 7/1.3 into a decimal to simplify our adding: 7 divided by 1.3 equals 5.38 boxes. Thus, the total becomes 5.75 + 6.5 + 5.38 = 17.63 boxes.