在估算外购原材料和燃料动力费的预测价格时，应按（ ）价格计算。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27080' and id < 2244859 and id<>'2244859' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27080' and id > 2244859 and id<>'2244859' order by id asc limit 5