Dear Khun John,
First of all, please accept my apologies regarding to the March Sales Report that I still can't get it right today but I will try my best if you would kindly enough to teach me once again.
Furthermore, it would be very nice if you could allow me to submit the monthly sales report by the 5th or at least by the 1st of every month instead of the last day of month because I need time to collect all information from sales department to summarize.
By the way, the sales report Jan – Mar 2015 is attached herewith for your comment and advice.
Best regards,
Cherry