1. **State the problem:** We need to find Lyla's total profit over two days, given that Monday's activity is -4 (money spent) and Tuesday's activity is 10 (money earned). 2. **Formula:** Total profit = Sum of money earned and spent over the days. 3. **Calculate total profit:** $$\text{Total profit} = (-4) + 10$$ 4. **Simplify the expression:** $$\text{Total profit} = 10 - 4$$ 5. **Final calculation:** $$\text{Total profit} = 6$$ 6. **Interpretation:** Lyla's total profit over the two days is 6 units of money.