My partner and I are going through a home renovation and are happy with the progress being made. In our contract, there is an allowance for windows priced at $22,000. The language is not clear if this allowance includes labor and installation. After receiving the invoice, the actual cost of the windows was $11,300. Obviously we want to be credited the difference. What can we do as homeowners in this situation? How do we approach our contractor about this? Thank you.