Suppose the drink is 4 yuan, the discount is 3.6 yuan, and the ice cream is 4.7-3.6= 1. 1 (yuan).

Suppose the beverage 3 yuan, 2.7 yuan after discount, and ice cream 4.7-2.7=2 (RMB).

So the original price of the beverage is 4 yuan, ice cream 1. 1 yuan.