Ritu had 400 mangoes. She sold 60 mangoes at 25% gain, 80 mangoes 20% gain, 120 mangoes at 10% gain and 140 mangoes at 20% loss. Her net gain / loss percent is:
1
\(7\frac{1}{2}\)% gain
2
\(4\frac{3}{4}\)% loss
3
\(3\frac{3}{4}\)% gain
4
None of these