SIMPLE RETAIL LOALTY SYSTEM

We are a coffee - pastries retail shop and we need a simple CRM system with customer loyalty features. Basically we want a desktop application with our shop members data and when a member makes a purchase, the cashier will use the application with a bar-code scanner or the members telephone number to find the member. In the members screen the cashier will have the option to add the amount in money the member spend at his visit and that amount will be converted to "bonus points" (using a fixed ratio e.g one euro spend equals to 10 points). If the member has bonus points from previous visits then the new ones will be added and if the sum is over a certain number the cashier will have the option to cash in those points by printing a gift receipt fro example for 3 euros that the member can spend in the shop in his next purchase. Ideally the program will allow two types of users , administrator and normal user, it will be able to show simple statistics like how many cash ins a member have had so far and when. It should be able to have at least 3 products categories where each category will have a different money to bonus points ratio so the cashier can input the money the member spend in 3 different fields e.g the member spend 2 euros in coffee that has a ratio 1-10 euros to bonus and 2 euros in some other product that has a different euro to bonus ratio. We are open to suggestions if you have done other similar projects.