in the following situations how many stars can I get?
1.$39coffee x1 and bought $21 drink again on the same day in the same shop
but not the same receipt.
2.i bought 39coffee x1 and bought $21 drink again on the same day in different shops
3.39coffee x1 and bought $21 drink again on a different day in the same shop
4.39coffee x1 and bought $21 drink again on different days and different shops