To write an expression for the total cost of renting shoes and bowling games, we can define the costs as follows:
- Let \( S \) be the cost of shoe rental.
- Let \( G \) be the cost per game.
- Let \( n \) be the number of games played.
The total cost can be expressed as:
\[ S + G \cdot n \]
This expression represents the cost of renting the shoes plus the cost of bowling \( n \) games.