Remember:
\[
NNP = GDP + NFIA - \text{Depreciation}
\]
where \(NFIA\) is the difference between factor income received from abroad and factor income paid abroad.
Step 1: Recall the chain from GDP to NNP.
Net National Product is
\[ NNP=GDP+NFIA-\text{Depreciation} \]
where NFIA is the net factor income from abroad.
Step 2: Find NFIA.
It is receipts minus payments, $200-220=-20$. The minus sign means we pay more abroad than we receive.