A shorts costs m120. The price increase by 10%. Find the new price.

Step 1: Calculate the amount of the price increase. The price increases by $10\%$. $\text{Increase amount} = 10\% of m120$ $\text{Increase amount} = \frac{10}{100} \times 120$ $\text{Increase amount} = 0.10 \times 120$ $\text{Increase amount} = m12$

Step 2: Calculate the new price. The new price is the original price plus the increase amount. $\text{New price} = Original price + \text{Increase amount}$ $\text{New price} = m120 + m12$ $\text{New price} = m132$

The new price is $\boxed{m132}$.