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1.计算总送货数量和未税金额的比例： 未税金额 / 总送货数量 = 220020 / 94000 = 2.33 2.将每笔送货数量乘以未税单价，得到每笔送货的未税金额： 第1笔送货：2.33 times 9 = 20.972.33×9=20.97 第2笔送货：2.33 times 8 = 18.642.33×8=18.64 第3笔送货：2.33 times 7 = 16.312.33×7=16.31 第4笔送货：2.33 times 6 = 13.982.33×6=13.98 第5笔送货：2.33 times 5 = 11.652.33×5=11.65 第6笔送货：2.33 times 4 = 9.322.33×4=9.32 第7笔送货：2.33 times 3 = 6.992.33×3=6.99 第8笔送货：2.33 times 2 = 4.662.33×2=4.66 第9笔送货：2.33 times 1 = 2.332.33×1=2.33 未税金额总计：20.97 + 18.64 + 16.31 + 13.98 + 11.65 + 9.32 + 6.99 + 4.66 + 2.33 = 144