The event will happen on Jun 1-4, 2

The event will happen on Jun 1-4, 2016 (next week), not sure if it be more appropriate to send in this request after the event?
In addition, understand the billing amount must be the actual amount from the event, summarized and billed to you by Keyman ..

ผลลัพธ์ (อังกฤษ) 2:

Will the event happen on Jun 1-4, the 2,016th (next Week), not sure if it be more appropriate in this Request to Send after the event?
In addition, the Billing Understand must be the amount Actual amount from the event, and Summarized. billed to you by Keyman ..