How to calculate last three columns? Please show steps

Aftertax Income $3,600 Cumulative Savings Time Month1 Month2 Income $4,500 More than Emergency Money available Fund? for investments Total Expenses 2000 Taxes $900 Debt Payments 400 ear1 Savings $1,200 Aftertax Income $3,600 Cumulative Savings Time Month1 Month2 Income $4,500 More than Emergency Money available Fund? for investments Total Expenses 2000 Taxes $900 Debt Payments 400 ear1 Savings $1,200