Suppose Party A and Party B press 6: 5, taking Party B as the standard, Party A should get 20÷5×6=24 yuan instead of 24 yuan, and Party A uses 80 yuan, with a difference of 24+80= 104 yuan.
B Original:104÷ (6/5-10/9) =1150 yuan.
A:1150 ÷ 5× 6 =1380 yuan.