Answer: There are 3 packages of cups and 2 packages of plates.
Explanation:
Since we have given that
Number of cups they sold = 8
Number of plates they sold = 12
For the least number of packages possible that will give them the same number of cups and plates , we'll find L.C.M. of 8 and 12.

So,
Packages of cups they purchase is given by

Packages of plates they purchase is given by
