通过计算,在对供应商和采购做出选择时,当3%增值税专用发票的价格小于等于17%增值税专票含税价格的0.8655倍时。选择提供3%增值税专用发票的供应商。反之,选择17%增值税专票的供应商。所以,分析取得不同发票对施工利润的影响,得从供应商处选择普通发票、3%增值税专用发票和17%增值税专用发票之间的采购价格的比例如表1。在选择不同供应商时,不仅仅考虑的是能否提供增值 Through calculation, when making a choice between supplier and purchasing, when the price of 3% VAT invoice is less than or equal to 0.8655 times of VAT tax return of VAT invoice. Choose suppliers who provide 3% VAT invoices. Instead, choose a supplier of 17% VAT coupons. Therefore, the analysis of the impact of different invoices on construction profits, the supplier should choose ordinary invoices, 3% VAT invoices and 17% VAT invoices between the purchase price ratio shown in Table 1. In selecting different suppliers, not only consider whether to provide added value