Surbhi bought a combined total of $25$ i-pads and i-phones. She marked up the i-pad by $20 \%$ on the cost price, while each i-phone was marked up by $Rs.\, 2000.$ She was able to sell $75 \%$ of the i-pads and $2$ i-phones and make a profit of $Rs.$ $49000 .$ The remaining i-pads and $3$ i-phones could not be sold by her. Find her overall profit or loss if she gets no return on unsold items and it is known that an i-phone costs $50 \%$ of an i-pad.

A shopkeeper sells sugar in such a way that the selling price of $950$ $g$ of sugar is the same as the cost price of $1\, Kg$ of sugar. What is his gain percent?

A shopkeeper sells a badminton racket, whose marked price is $Rs.\, 30$, at a discount of $15 \%$ and gives a shuttle cock costing $Rs.$ $1.50$ free with each racket. Even then he makes a profit of $20\%.$ His cost price per racket is (in $Rs$)

A cycle dealer offers a discount of $10 \%$ and still makes a profit of $26 \% .$ What does he pay for a cycle whose marked price is $Rs.\,840$? (in $Rs.$)

Nisha bought a number of oranges at $2$ for a rupee and an equal number at $3$ for a rupee. To make a profit of $20 \%$ she should sell a dozen for (in $Rs.$)

When Ram sold his book for $Rs.\, 255$ he made a loss of $15\%.$ For how much he should have sold it if he wanted to make a profit of $5 \% ?$