Meimei's mother went to the bank to withdraw money, and when she got the number, it was ranked as 1 15. While waiting for the call, she found that Miaomiao's mother had also come. She is at 135, and they agreed to go to the supermarket together after withdrawing money. The bank has five windows. Assuming that each window takes an average of 2 minutes to process 1 person, how much will Meimei's mother spend?

To (135-115) ÷ 5× 2+2 =10 (minutes)