Store my customers details on spreadsheet

I have a book shop. I'm keeping records of my good customers and I'm sending vouchers annually for them. Therefore I need to have a list of them. I'm taking their details. I'll give it to you then you have to store those details on a spreadsheet. The data is about customer's name , address , telephone number , bought amount... You have to enter thier address very accurately. I'll send all the data after selecting you.