if([期初数_数量]<=0 And [入库数_数量]<=0 And [入库数_金额]<=0,[入库数_单价],If([发出数_单价] <> 0,([期初数_金额] + [入库数_金额]) / ([期初数_数量] + [入库数_数量]),If([发出数_单价] > 0,([期初数_金额] + [入库数_金额]) / ([期初数_数量] + [入库数_数量]),If(([期初数_金额] + [入库数_金额]) / ([期初数_数量] + [入库数_数量]) = 0,[入库数_单价],0))))