Sears had the outdoor grill I wanted. The clerk wouldn't sell it to me. It was the food sample.（compound-complex sentence)
Sears had the outdoor grill I wanted, but the clerk wouldn't sell it to me because it was the food sample.
Sears had the outdoor grill I wanted. The clerk wouldn't sell it to me. It was the food sample.（compound-complex sentence)
Sears had the outdoor grill I wanted, but the clerk wouldn't sell it to me because it was the food sample.
