Amit purchased $13$ chairs for $Rs. 115$ each and sold all of them for $Rs. 1220$. Find the profit or loss on the transaction.

Sanjay purchased a chair marked at $Rs. 800$ at $2$ successive discounts of $10 \%$ and $15 \%$ respectively. He spent $Rs. 28$ on transportation and sold the chair for $Rs. 800$. How much is his gain percentage (in $\%$)?

$60 \%$ of the cost price of an article is equal to $50 \%$ of its selling price. Then the percentage of profit or loss on the cost price is

If the cost of $1$ banana is $Rs. 1.25$ and the cost of $1$ apple is $Rs. 1.75$,what will be the total cost of $2$ dozen bananas and $3$ dozen apples in $Rs.$?

If the cost price of $20$ tables is equal to the selling price of $25$ tables,find the loss percentage. (in $\%$)

Aditya bought $200$ dozen oranges at $Rs. 10$ per dozen and he spent $Rs. 500$ on transportation. He sold each orange at $Rs. 1$ each. What was his profit or loss $\%$?