1. Each swordfish A is 45 cents more expensive than each bigeye B, and A-B is 0.45 yuan;

2. The same amount of money, 22b =16a;

3.A=B+0.45

》》22B= 16(B+0.45)

》》22B= 16B+7.2

》6B=7.2

》》B= 1.2

》22B+ 16A = 22B+22B = 44B = 52.8；

Xiao Ming spent 80 points in 52 yuan.