<p> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615531816100.jpg"><br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615532610702.jpg"><br> 订货批量Q<sub>1</sub>=6324.6>600,不符合题目条件<img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615533473509.jpg"><br> 订货批量Q<sub>2</sub>=6666.7,符合题目条件6000<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615534581825.jpg"><br> 订货批量Q<sub>3</sub>=7453.6,符合题目条件7000<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615535569617.jpg"><br> 订货批量Q<sub>4</sub>=7905.7,不符合题目条件80004=8001试算<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615551426686.jpg"><br> 订货批量Q<sub>5</sub>=8165.O,不符合题目条件Q>9000,可以Q<sub>5</sub>=9001试算<br> 采购总成本=进货价+采购次数×每次采购费用+平均库存×单位产品年储存费<br> P<sub>2</sub>=45元时,采购总成本<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/201510261555317542.jpg"><br> =2250000+7.5×4000+3334×9=2310006(元)<br> P<sub>3</sub>=36元时,采购总成本<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/201510261556074619.jpg">=1800000+6.7×4000+3727×7.2=1853634(元)<br> P<sub>4</sub>=32元时,采购总成本<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615565074335.jpg">=1600000+6.25×4000+4001×6.4=1650606(元)<br> P<sub>5</sub>=30元时,采购总成本<br> <img src="http://que-oss.fenziquan.com/web/akimg/asource/2015102615570017900.jpg">=1500000+5.555×4000+4501×6=1549226(元)<br> 价格P<sub>5</sub>=30时,经济批量为9001箱,采购总成本最低为1549226元。</p>