We believe that your quotations are the best. However,please let us know
the breakdowns of the total costs of the two quotations(proposals),so that
we can explain those prices to the buyers to ease the confusions and misunderstandings
they now have .
注
quotations是报价
如果要加上始终
可用always
We always believe...
2个建议
the two proposals
如果这些建议是指报价
可用quotations
the confusions and misunderstandings they now have
原文是 the confusions and misunderstandings (which) they now have
意思是
他们(买家)目前有著的困惑及误解
ease减轻
也可用dispel
breakdown细明