Answer:
Consumption is a key component in the calculation of GDP and refers to how much money out of disposable income is spent by households on goods (both durable and non-durable) and services.
Disposable income is how much money households have after taxes. Their consumption and spending come from here.
Whatever is not spent is saved. Savings are therefore calculated as;
Savings = Disposable income - Consumption
Savings for the above are therefore,
$20,000 - $22,000 = -$2,000
21,000 - 22,500 = -$1,500
22,000 - 23,000 = -$1,000
23,000 - 23,500 = -$500
24,000 - 24,000 = $0
25,000 - 24,500 = $500
26,000 - 25,000 = $1,000
27,000 - 25,500 = $1,500
28,000 - 26,000 = $2,000