We are a clothing online store.
We want to sell products as a Full Outfit and as separate pieces
Product A ( Jacket, Top, Pants) Qty : 5
Product B (Jacket From Product A) Qty : 5
Product C (Top From Product A) Qty : 5
Product B (Pants From Product A) Qty : 5
So we have only 5 of these outfits..
If someone buy just a Top:
Product A Qty: 4
Product B Qty: 5
Product C Qty: 4
Product D Qty: 5
If someone bought the whole outfit Then: Product A Qty: 4
Product B Qty: 4
Product C Qty: 4
Product D Qty: 4