Revenue Valuation Tool - P&L Statement

Based on the revenue valuation tool it is impossible to make 20% gross profit with the Trump Tariff on China. Has anyone else noticed this? Even with a product cost of 16% and shipping at 4% maximum gross profit is 16%. This was eye opening... as taxes weren't brought to light like this until now. During the gross profit discussion, the landed cost example was 24%, whereas in the P&L Statement workbook it's 47%. That's a HUGE difference. Does anyone have any insight on this?