How can I calculate Investment, Net exports, Government savings, and Current account balance?

Firm A Wages paid to employees 192 Taxes paid to government 157 Revenue received 828 Sold to Public (newly produced) 263 Sold to Firm B 73 Sold to Firm C 58 Sold to a foreign country 351 Sold from inventory to Public 83 Unsold production 94 After-tax profit 479 Firm B Wages paid to employees 98 Taxes paid to government 139 Input purchased from Firm A 73 Input purchased from Firm C 35 Input imported 56 Revenue received 715 Sold to Public (newly produced) 392 Sold to Government 192 Sold to Firm C 39 Sold from inventory to Public 92 sold to Public (newly produced) 392 Sold to Government 192 Sold to Firm C 39 Sold from inventory to Public 92 After-tax profit 314 Firm C Wages paid to employees 128 Taxes paid to government 158 Input purchased from Firm A 58 Input purchased from Firm B 39 Revenue received 609 Sold to Public (newly produced) 330 Sold to Government 184 Sold to Firm B 35 Sold from inventory to Public 60 After-tax profit 226 Additional Information Government transfers 291 Interest on government's debt 41 Private Saving 328