Combined Products into Kits

[www.PiShop.co.za]

Not sure if this is the right subare to post this question but if not... please move me to the right place.

I have an electronics store and I group products into kits for easier sales (especially when people are not technical)
the problem I face is: I need to keep track of stock.

If I include product A into Kit 1 and I sell 5, I need product A's stock level to be decreased... is this possible? if so, how?
Note: the same applied when you provide product options (where the options are additional stock items)