Please help with "If 100 items normally cost $300 but if I got 300 items I would get it for $800,..."

[Grizzlyturds]

If 100 items normally cost $300 but if I got 300 items I would get it for $800, second part I got 1 different item for $100 and 7 different items for $15 apiece. Me and someone both pitched in 500 apiece now person 1 would have spent his money regardless I offered to throw in 500 to get that price break on the 300 items so we got $100 discount the one item that costs $100 I want all to myself and the 7 items at 15 we wanted to split how is this fairly divided between us

 

[Dr.Peterson]

If 100 items normally cost $300 but if I got 300 items I would get it for $800, second part I got 1 different item for $100 and 7 different items for $15 apiece. Me and someone both pitched in 500 apiece now person 1 would have spent his money regardless I offered to throw in 500 to get that price break on the 300 items so we got $100 discount the one item that costs $100 I want all to myself and the 7 items at 15 we wanted to split how is this fairly divided between us

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