How much bread have you bought?
How many guests have you invited?
How many meat sandwiches have you made?
How much salad have you prepared?
How many slices of bread have you cut?
How many kilos of apples have you bought?
Cмотри исчисляемые или неисчисляемые существительные. C исчисляемыми - many, с неисчисляемыми - much...
У меня могут быть ошибки, извини если что.....! Удачи))