Online shopping comparison calculators

So lets say there are 4 online stores, and i want to compare the combination for 4 diffrient items, diffrient prices too
and it must be all 4 items no matter which store.
im gussing the calcluter should get the "space sample" for each store, and also find the best combination, by comparing them with each other not just the total of store A and B etc.. but all possible combination, also it must be all 4 items.

for example:
store A : itemA,itemB,itemC,itemD = X $
store A : itemA,itemC,(itemB from store B),(item D from store D) = X $
and for the other stores too
store B : itemA,itemB,itemC,itemD = X$
store B : itemB,itemC,( itemA from Store D),(item D from Store C) = X $
etc ...

at the end it shows the best combintion to go with, which is all of the 4 items, thats the goal,
and of course you could change how many stores and how many items as well.

Request has been closed

The request has been closed because it does not contain enough information to implement the online calculator.

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Creative Commons Attribution/Share-Alike License 3.0 (Unported) PLANETCALC, Online shopping comparison calculators