Write a system of equations to describe the situation below, solve using any method, and fill in the blanks.

At the Bluepoint Ice Cream Parlor, one group of friends ordered 3 small servings of ice cream and 1 large serving of ice cream for $13. Another group of friends ordered 2 small servings of ice cream and 1 large serving of ice cream for $10. How much does the ice cream cost?

The ice cream costs $
for a small serving and $
for a large serving.