To determine how much Tokuif can increase his discretionary spending, let's analyze the changes in his budget step by step.
1. Identify the current and new net incomes:
- Current net income: [tex]$600
- New net income: $[/tex]650
2. Determine the change in net income:
[tex]\[
\text{Change in net income} = \text{New net income} - \text{Current net income} = 650 - 600 = 50
\][/tex]
3. Identify the current and new savings:
- Current savings: [tex]$80
- New savings: $[/tex]110
4. Determine the change in savings:
[tex]\[
\text{Change in savings} = \text{New savings} - \text{Current savings} = 110 - 80 = 30
\][/tex]
5. Calculate the possible increase in discretionary spending:
- The increase in net income can be used for either increased savings or increased discretionary spending.
6. Determine how much of the net income increase is allocated to savings:
[tex]\[
\text{Portion of net income increase allocated to savings} = 30
\][/tex]
7. Calculate the remaining amount from the net income increase after increasing savings:
[tex]\[
\text{Remaining amount} = \text{Change in net income} - \text{Change in savings} = 50 - 30 = 20
\][/tex]
Therefore, Tokuif can increase his discretionary spending by [tex]\( \boxed{20} \)[/tex] dollars.
