the gloves where 15 dollars per pair. first you would add 12 plus 5 because 12 dollars per hat for 5 kids. now you want to subtract the sum of 12 and 5 (60) from the total (135) and you’ll get 75. now you want to decide 75 by 5 (because five pairs of gloves) and you’ll have your answer. (15$) hope this helped !