Hi.. I need the information on how to apply multiple entry visa and the cost.

What type do you want to apply?
The required documents have relations with the type you want to apply. Based on your documents, the embassy has the final right to decide whether to give you a multiple type or single entry or double entry.

In general, if you want to apply for a multiple one, you need to provide as much documents as possible to show why you need a multiple one. For a multiple one, the fee is 1,140,000 rupees.