Let’s start with the travoprost boxes! she needed 15 travoprost boxes! But, you only have 10 travoprost boxes, which means you need 5 more, to have all 15 boxes in which you need! Now you need 12 latanoprost boxes! But you only have 3! So, you need 9 more latanoprost boxes to have the full 12 boxes you need! So, now you need to order 9 latanoprost boxes, and 5 travoprost boxes! Do you get it now?
