ATP data analysis in sales order va01

experts help

In sales order vao1 i enterd a material 26462373727 and qty as 1 and storage location 5010.

Then the atp check screen poped up saying open quantity 1 and confirmed quantity 0.

then at the top application toolbar I pressed on ATP quantites and got the screen with the below data.

Totals display

Receipts 4

issues 1 confirmed issues 1

ATP Situation

Date MRP-element MR-element-data Rec/reqdqty Confirmed CumATPQTY

17.11.2009 Stock 4 3

10.01.2009 Delvry Totals record 1- 1

10.01.2009 Delvry 1263866848/000010/0000 1- 1 3

17.11.2009 SimReq Simulated requirements 1- 0 3

17.11.2009 SLocSt 5010 1 0 0

10.01.2009 Delvry Totals record 1- 1 0

17.11.2009 SimReq Simulated requirements 1- 0 0

17.11.2009 SLocSt 5020 0 0 0

17.11.2009 SLocSt 5030 3 0 3

17.11.2009 SLocSt 5010 0 0 0

17.11.2009 SLocSt 5020 0 0 0

17.11.2009 SLocSt 5030 0 0 0

experts please tell me what exactly the above indicate , I am not able to understand.

Receipts ,issues ,confirmed issues,MRP-element ,MR-element-data,Rec/reqdqty,Confirmed,CumATPQTY..