Based on the information given the amount that each elevator cost them is $2,000.
Using this formula
Cost=Sales price/(1+Percentage profit)
Where:
Sales price=$2,500
Percentage profit=25%
Let plug in the formula
Cost=$2,500/(1+.25)
Cost=$2,500/1.25
Cost=$2,000
Inconclusion the amount that each elevator cost them is $2,000.
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