16+9+4+5+5+ 1=40 (pieces)

Test everyone: this is a math problem that can measure whether a person has a business mind. Master Wang sells fish. I bought a catty of fish for 45 yuan, and now I'm having a sale at a loss. Customer 35 yuan bought a catty and gave Master Wang fake money 100 yuan. Master Wang had no change, so he asked his neighbor to change it 100 yuan. Afterwards, neighbors found that the money was fake during the process of saving money, and it was confiscated by the bank. Master Wang also lost his neighbor 100 yuan. How much did Master Wang lose?

Note: the difference between Jin and kg

A * * * lost100+(45× 2-35) =100+55 =155 yuan.