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!