I make a total of $53,934 per year pretax.

Each year, I invest 5% of my pre-tax income in a retirement account, and I support charities with donations totaling 10% of my pre-tax income. Calculate my taxable income by subtracting my annual retirement investments and charitable contributions from my annual salary

Part B. Of my post-tax income, I spend $70 per week on food, and I put 5% of your income into savings. How much income remains?