A dealer sold a camera for $₹1080$ gaining $\frac{1}{8}$ of its cost price. Find $\left(i\right)$ the cost price of the camera, and $\left(ii\right)$ the gain percent earned by the dealer.

Meenakshi sells a pen for $₹54$ and loses $\frac{1}{10}$ of her outlay. Find $\left(i\right)$ the cost price of the pen, and $\left(ii\right)$ the loss per cent.

A dealer gets $₹940$ more if instead of selling a table at a loss of $10\%$, it is sold at a gain of $10\%$. Find the cost price of the table.

A dealer gets  $₹56$ less if instead of selling a chair at a gain of $15\%$, it is sold at a gain of $8\%$. Find the cost price of the chair.

A cycle was sold at a gain of $10\%$. Had it been sold for $₹260$ more, the gain would have been $14\%$. Find the cost price of the cycle.

Sonu buys $40 \mathrm{kg}$ of wheat at $₹12.50$ per $\mathrm{kg}$ and $30 \mathrm{kg}$ of wheat at $₹14$ per $\mathrm{kg}$. At what rate per $\mathrm{kg}$, $5\%$ should he sell the mixture to gain $5\%$ on the whole?

Wasim bought two cricket bats for $₹840$ and $₹360$ respectively. He sells the first bat at a gain of $15\%$ and the second one at a loss of $5\%$. Find his gain or loss per cent in the whole transaction.

Hema bought two pairs of jeans for $₹1450$ each. She sold one of them at a gain of $8\%$ and the other at a loss of $4\%$. Find her gain or loss per cent in the whole transaction.

A grocer purchased $200 \mathrm{kg}$ of rice at $₹25$ per $\mathrm{kg}$. He sold $80 \mathrm{kg}$ of it at a gain of $10\%$ and $40 \mathrm{kg}$ at a loss of $4\%$. At what rate per $\mathrm{kg}$ should he sell the remainder to gain $8\%$ on his total investment?