英语翻译关于报价与上次我们商谈时有差异需要向您特别说明一下：上次面谈我们只是考虑到材料费用,但在这一个月的实际操作中,人

About the difference between the quotation and what we discussed last time,I'd like to make the explanation as following to you:
When we met in person last time,we only considered the material cost.But during the operation of last month,we found out that both labor cost and labor-hours consumption are far beyond the current cost of supplies.The attached quotation is the price after our careful recalculation,Please kindly confirm.Thank you very much for your understanding!