Buying alcohol for fuel

Ruling on telling people a price other than the price he really paid

When buying a certain number they give a free service

Ruling on selling an item on credit for a higher price than if it is paid for immediately

Ruling on selling Islamic tapes and books in the mosque

Giving up one’s telephone line in return for having the bill paid

Selling at more than 10% profit

Buying with funds from a savings scheme when he is one of the members of the scheme

Selling products to children for more than the wholesale price

What is the ruling on selling women’s products?