I am bidding a design / build basis job. a small job, some remodel , some new work, service up grade. The specs call for a $20,000 allowance for Recessed & decorative lighting fixtures and dimmers, (materials only; installation cost provide in section 16.) My question is, I did the estimate with value engineering and came up with $5000 worth of items(fixtures and dimmers), I then backed out the $5000 and added the $20,000 allowance, It doubled the bid price. What am i missing here ? How should this work ?