We have a new 6x18 framed marquee made up of 6x3 bays. So the options are: 6x3, 6x6, 6x9, 6x12, 6x15 & 6x18.
If we add these as parent/child type inventory items, could you confirm the correct structure?
6x18 is the parent as it's the largest but if the others are all only assigned a single letter, they don't seem to work with the inventory count ie. a 6x15 still shows as available when a 6x3 is booked (when it shouldn't). It works when you check 6x18 (as it's the parent)
So ATM, we have:
6x3 = A, 6x6 = B, 6x9 = C, 6x12 = D, 6x15 = E, 6x18 = A,B,C,D,E