Haw. Rev. Stat. § 103D-1008: Taxpayer preference.

For evaluation purposes, the bidder's tax-exempt price shall be increased by the applicable retail rate of general excise tax and the applicable use tax. For competitive sealed bids, the lowest responsive, responsible bidder, taking into consideration the above increase, shall be awarded the contract, but the contract amount of any contract awarded shall be the amount of the price offered and shall not include the amount of the increase.