Kunal bought a suitcase with $15 \%$ discount on the labelled price. He sold the suitcase for $Rs$ $2880$ with $20 \%$ profit on the labelled price. At what price did he buy the suitcase? (in $Rs.$)

$'A ^{\prime}$ sells a good to $'B ^{\prime}$ at a profit of $10 \%$ and $B$ sells it to $'C ^{\prime}$ at a profit of $20 \% .$ Find out the resultant profit. (in $Rs.$)

$Mr$ A sold a goods, to $Mr$. $B$ at $10 \%$ discounted value of printed rate. The discounted value is $Rs.\, 1242.$ If $15 \%$ profit is earned on purchase rate by selling the goods at printed rate, what is the purchase rate? (in $Rs.$)

A shopkeeper marks his goods at $25 \%$ above his cost price and allows customers a discount of $12 \frac{1}{2}\%$ for cash. Find his $\%$ profit?

Nutan bought a watch with $24 \%$ discount. If she pays $Rs.\, 779$ for that watch then what is the marked price of watch in $Rs.$?

Successive discounts of $10 \%, 20 \%$ and $50 \%$ will be equivalent to a single discount of..........$\%$