I submitted this table to the economics section and they were unable to solve it, I desperately need help because I don't understand the equations its asking for. Please help me finish the table and I will be so grateful.

KEY: S = Savings, DI = Disposable Income, C = Consumption, MPS = Marginal Propensity to Spend, MPC = Marginal Propensity to Consume

Table 1: Consumption/Savings Data Student $1,250.00 $1,500.00 $1,750.00 $2,000.00 $2,250.00 Disposable Monthly Income 1 $0.00 $50.00 ($50.00) ($50.00) $50.00 Monthly Expenditures 2 $100.00 $150.00 $100.00 $100.00 $100.00 Food/Household 3 $500.00 $625.00 $700.00 $875.00 $1,025.00 Housing 4 $125.00 $150.00 $175.00 $200.00 $225.00 Transportation 5 $390.00 $520.00 $790.00 $920.00 $870.00 Medical 6 $70.00 $100.00 $150.00 $200.00 $250.00 Entertainment 7 $50.00 $100.00 $0.00 $50.00 $0.00 Ordinary Expenses 8 $200.00 $450.00 $450.00 $550.00 $550.00 Savings Averages Proportion of DI Change in s Average C Proportion of DI | Change in C Check: S+C=DI Sum proportions=1 Change in DI MPS-chgS/shgDI MPC=chgC/shgDI Check:MPS+MPC-1 Table 1: Consumption/Savings Data Student $1,250.00 $1,500.00 $1,750.00 $2,000.00 $2,250.00 Disposable Monthly Income 1 $0.00 $50.00 ($50.00) ($50.00) $50.00 Monthly Expenditures 2 $100.00 $150.00 $100.00 $100.00 $100.00 Food/Household 3 $500.00 $625.00 $700.00 $875.00 $1,025.00 Housing 4 $125.00 $150.00 $175.00 $200.00 $225.00 Transportation 5 $390.00 $520.00 $790.00 $920.00 $870.00 Medical 6 $70.00 $100.00 $150.00 $200.00 $250.00 Entertainment 7 $50.00 $100.00 $0.00 $50.00 $0.00 Ordinary Expenses 8 $200.00 $450.00 $450.00 $550.00 $550.00 Savings Averages Proportion of DI Change in s Average C Proportion of DI | Change in C Check: S+C=DI Sum proportions=1 Change in DI MPS-chgS/shgDI MPC=chgC/shgDI Check:MPS+MPC-1