Sales have fallen dramatically as consumers have turned instead to vinaigrettes, salsas, and mayonnaise.
Consumers prefer vinaigrettes, salsas, and mayonnaise for their sandwiches. 
mnli hypothesis: Consumers prefer vinaigrettes, salsas, and mayonnaise for their sandwiches.  premise: Sales have fallen dramatically as consumers have turned instead to vinaigrettes, salsas, and mayonnaise.