To find out how much more Suzi can spend on this outing, we start by determining her total budget and the amount already spent.
Suzi's total budget for the outing is $28. She has spent:
- $8 on lunch
- $12 on movie tickets
First, we calculate the total amount spent so far:
\[ \text{Total spent} = 8 + 12 = 20 \]
Next, we subtract the total amount spent from her total budget to find out how much more she can spend:
\[ \text{Amount remaining} = \text{Total budget} - \text{Total spent} = 28 - 20 = 8 \]
Thus, Suzi can spend $8 more on this outing without having a negative balance.