| http://www.w3.org/ns/prov#value | - Items such as coffee and sandwiches can have a profit margin as high as 80%, whilst minerals and confectionary can be as low as 30%, so getting the right mix of products is very important if you are to make a real profit from your caf??.These are the three traditional revenue streams and quite often they each contribute a third towards the overall turnover as we mentioned.
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