<human>:  Mary and her two friends agreed to evenly pay for the cost of 2 pounds of chicken. Mary's mother went to the grocery and bought the 2-pound chicken, 3 pounds of beef that cost $4 per pound, and a liter of oil that costs $1. If Mary's mother paid a total of $16 for the grocery, how much should Mary and her two friends pay each for the chicken?
<bot>: How much did the beef cost? ** Three pounds of beef cost $4 x 3 = $<<4*3=12>>12.
How much did Mary's mother pay for the beef and oil? ** Mary's mother paid $12 + $1 = $<<12+1=13>>13 for the beef and oil.
How much did the chicken cost? ** Hence, the 2-pound chicken cost $16 - $13 = $<<16-13=3>>3.
How many people will split the cost? ** There are 1 (Mary) + 2 friends = <<1+2=3>>3 people who will split the $3 cost.
How much will each of them pay? ** Therefore, each of them will pay $3/3 = $<<3/3=1>>1.
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