Not sure what your question is asking for, but it seems most likely you want to know what the better deal is assuming anybody’s okay spending 1700 on 5 laptops. You know one offer is 320 for 1 laptop, but to find the price for one laptop with the other offer do as shown:
1700 is for 5 laptops, so divide the price by the number of laptops to get the price per laptop.
1700/5=340
As $1,700 for 5 laptops makes each laptop cost $340, the offer making 1 laptop cost $320 is clearly the more cost effective choice.