Perhaps the neatest way to do this is to notice that if Lee had not put in the extra 35c, they would have only paid $5.60. However, they would have each given the same amount then. So first subtract Lee's additional contribution 5.95 - 0.35 = 5.60.
Now divide the remainder by 2 to find Jamie's share 5.60 ÷ 2 = $2.80.
Lee contributed 2.80 + 0.35 = $3.15.
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