1. The problem asks for the total amount of money Eric saves based on hours worked making sandwiches ($s$) and delivering orders ($d$). 2. The expression given is $$\frac{1}{2}(10s + 14d)$$ which means Eric earns $10 per hour$ for sandwiches and $14 per hour$ for deliveries, but only saves half of that total. 3. To find the total savings for $s=5$ hours and $d=4$ hours, substitute these values into the expression: $$\frac{1}{2}(10 \times 5 + 14 \times 4)$$ 4. Calculate inside the parentheses: $$10 \times 5 = 50$$ $$14 \times 4 = 56$$ So, $$\frac{1}{2}(50 + 56) = \frac{1}{2}(106)$$ 5. Simplify the expression: $$\frac{1}{2} \times 106 = 53$$ 6. Therefore, Eric saves $53 this weekend. Final answer: **53**