Answer:
Jeffrey has 39 lunch boxes left in his collection.
Explanation:
Jeffrey started with 32 superhero lunch boxes, 11 outer space lunch boxes, and 28 rock band lunch boxes, for a total of 32 + 11 + 28 = 71 lunch boxes.After giving his cousin 32 lunch boxes, Jeffrey's collection is reduced by that amount: 71 - 32 = 39 lunch boxes.