个人认为既然是商务信函,应更正式、更书面化些.供参考
This morning the samples have been sent to you,enclosed are sample photos for your reference.Would you please approval it before this weekend at your earliest convenience?It will be highly appreciated for our ahead of delivery schedule.Thanks .
如果您能在本周未能批核此办--如果您能在本 周末 能批核此办?
口语化的
the samples have been sent to you,sample photos as affix with my letter.It is fine to finish the approval process for our delivery as soon as possible.