A man sells two article at Rs. 9,975 each. He gain 5% on one article and loses 5% on the other. Find his overall gain or loss.

\[\begin{array}{*{20}{c}} {}&{\text{I}}&{{\text{II}}} \\ {{\text{Cost Price}} \to }&{{{20}_{ \times 19}}}&{{{20}_{ \times 21}}} \\ {{\text{Profit/Loss}} \to }&{ + {1_{ \times 19}}}&{ - {1_{ \times 21}}} \\ {{\text{Sales Price}} \to }&{{{21}_{ \times 19}}}&{{{19}_{ \times 21}}} \end{array}\]
21 × 19 unit → 9975
1 unit → 25
Loss = 2 unit = 2 × 25 = Rs. 50