Could anyone explain these question about GDP calculation, please.

Calculate GDP (to the nearest dollar) ITEM SBN CONSUMPTION EXPENDITURE 1,300 COMPENSATION OF EMPLOYEES 1,100 PARTNERSHIP INCOME 1,000 OTHER INCORPORATED INCOME 500 GOVERNMENT PURCHASES 100 CORPORATE PROFITS 400 SOLE PROPRIETORS INCOME 300 INDIRECT TAXES LESS SUBSIDIES 100 NET EXPORTS -200 DEPRECIATION 900 Answer: 1,200 X (4,300) ITEM $BN CONSUMPTION EXPENDITURE 1,100 COMPENSATION OF EMPLOYEES 800 PARTNERSHIP INCOME 600 OTHER INCORPORATED INCOME 100 GOVERNMENT PURCHASES 250 CORPORATE PROFITS 300 SOLE PROPRIETORS INCOME 700 INDIRECT TAXES LESS SUBSIDIES 200 NET EXPORTS 500 DEPRECIATION 300 Answer: 3,250 X (3,000)