求翻译：虽然总价不变，但承包商获得的各个项目结算价格的现值之和将比原来的报价高，从而其能获得更高的经济效益，以保证整个项目最终盈利。是什么意思？

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Although the total price is invariable, but the contractor obtains each project settlement price sum of current value will be higher than the original quoted price, thus its will be able to obtain a higher economic efficiency, guaranteed the entire project will finally gain.

Although price unchanged, but contractors for settlement price and the present value of the individual items are higher than in the original quote, so they can obtain higher economic efficiency, to ensure that the project ultimately profitable.