Sardar singh bought $200$ dozen oranges at $Rs.\,10$ a dozen. He spent ₹500 on transportation. He sold them at $Rs.\,1$ each. What was his profit or loss percent?

A trader mixes three varieties of groundnuts costing $Rs. \,50, Rs.\, 20$ and $Rs.\, 30$ per $k g$ in the ratio $2: 4: 3$ in terms of weight and sells the mixture at $Rs.\, 33$ per $kg .$ What percentage of profit does he make?

A fruit vendor buys $10$ bananas for $Rs.\, 14$ and sells them at $12$ for $Rs.\,15$. Find his percentage gain or loss.

A shopkeeper has to sell $24\, Kg$ of sugar. He sells a part of these at a gain of $20 \%$ and the rest at a loss of $5 \% .$ If on the whole he earns a profit of $10 \%$, the amount of Sugar sold at a loss is in $Rs.$?

There would be a $10 \%$ loss, if rice is sold at $Rs.\, 54$ per $kg.$ To earn a profit of $20 \%,$ the price of rice per $kg$ will be (in $Rs.$)

Ramesh purchased a bicycle for $Rs.\,5200$ and spent $Rs.\,800$ on its repairs. He had to sell it for $Rs.\,5500.$ Find out his profit or loss percent.