When Country A is in a economy that trades only with Country B, and that neither country employs any foreign labor. The following are from Country As Balance of Payments Statistics: Exports of Goods and Services: 200 Imports of Goods and Services 300 Changes in Central Bank Foreign Exchange Reserves: 50 Country Bs Purchase of Country As Government Bonds : 100 Country As FDI in Country B: 30

Find the Net Foreign Borrowing of Country A.