Answer:
180 cold beverages and 45 hot beverages were sold
Step-by-step explanation:
Let x be the no. of cold beverages were sold
Let y be the no. of hot beverages were sold
We are given that On Saturday, 4 times as many cold beverages were sold as hot beverages.
So, x=4y
Cost of 1 cold beverage = $1.50
Cost of x cold beverage = 1.50x
Cost of 1 hot beverage = $2.00.
Cost of y hot beverage = 2y
On Saturday, drink receipts totaled $360
So, 
A system of equations to represent the beverage sales on Saturday:
---1
---2
Substitute the value of x from 1 in 2
Substitute the value of y in 1


Hence 180 cold beverages and 45 hot beverages were sold