Answer: Roger wants to buy at least 6 items, so he needs to buy at least 6 pants or 6 shirts or a combination of both.
Explanation:
The cost of 6 pants is $30 x 6 = $180.
The cost of 6 shirts is $20 x 6 = $120.
If Roger wants to buy both pants and shirts, he can buy 3 pants and 6 shirts for a total cost of $90 + $120 = $210.
Another option would be 4 pants and 5 shirts for a total cost of $120 + $100 = $220.
Thus, Roger can buy either 6 pants, 6 shirts or a combination of 3 pants and 6 shirts or 4 pants and 5 shirts with his $200.