Can this be used for different products in different categories?
e.g.
Category A from product/supplier A, price £10
Category B from product/supplier A, price £10
Category C from product/supplier A, price £10
Bought individually they come to £30, but buy them all together on the same order and pay £25!
Or to push the boundary further,
Category A from product/supplier A, price £10
Category B from product/supplier B, price £10
Category C from product/supplier B, price £10
Again bought as individual items, the cost is £30 but buy them all together on th same order and pay just £25!



