how many shoppers were surveyed? I have 41 shoppers, how did i get this answer?

Use the following stemplot, to answer questions 7 - 10. The following is based on a random sample of shoppers at a grocery store. Total Amount Spent on a Single Grocery Trip (to the nearest dollar) 10 | 1112233 11 | 012222222222334 12 | 1224456 13 | 16788 14 | 367 15 | 12 N 16 | 5 what gives me 17 19 4 Key: 10|0 = 100