CPM Homework Help : INT1 Problem 4-30

At Jaques’ Bistro they serve two sizes of espressos, small $(S)$ and large $(L)$ . In a given day they made $x$ of the small drinks and y of the large drinks. What do the following expressions represent in this context?

Hint:

The variables $S$ and $L$ represent the volume sizes of the respective drinks.

$S + L$

Answer (a)
Since $S$ and $L$ are volume sizes, then $S + L$ represents the sum of the volumes of the drinks.

$x + y$

Hint (b)
What did the variables $x$ and $y$ represent?

$xS + yL$
Hint (c)
Since $x$ is the number of small drinks sold, and $S$ is the volume of the small drink, then $xS$ represents the total volume of all small sized drinks sold. What would $yL$ represent?