Good afternoon , sir . What can I do for you ?   I'd like to get this prescription filled .   No problem . Please wait a minute . ( She goes to the back for a few minutes . ) Here is your medicine , sir . Take two tablets after each meal and once before bed .   Thanks . Do you sell aspirin here ?   Yes , our over-the-counter medicine is over there on that shelf .   Oh , I see it . Do you have multi-vitamins ?   Yes , right over here .   ( The customer gets the aspirin and vitamins . ) That'll be $ 16.00 .   Here's a twenty .   Here's your change . Thank you . 