Set up:
Product 1: Christmas tree ( Fraser fir,  Blue spruce )

Product 2: Ornaments ( Red, Blue, Gold ) (Pack of 12, Pack of 24)

Product 3: RTA Christmas - Includes a tree and ornaments

The question here is:
How can I set up my product, BOM, to be able to reflect this setup? Ideally, the RTA Christmas kit will inherit the values from Product 1&2 instead of building it out in Product 2's BOM and then going it again in Product 3. More importantly, to keep the stock count accurate, meaning it is all pulling from the same item for product 2: (Red, Pack of 12) will pull from the same item as for someone that has ordered Product 3: (Fraser fir, Red, Pack of 12)