Problem
An economy, Delta exported goods worth $30 billion and services worth another $10 billion in 2020, It imported goods worth $40 billion and services worth $8 billion. Receipts of income from abroad were $20 billion while income payments going abroad were $18 billion. Government transfers from Delta to the rest of the world were $7 billion, while various Delta government agencies received payments of $3 billion from the rest of the world. Calculate Delta merchandise trade deficit and current account balance for 2020.