Accounting & Variance Queries

Hello,

Please refer the below screenshot of P31022 screen & I would like to know what comes in Standard, Planned, Current & Actual Fields. I have gone through the various documents but would be helpful if some tell me this in simple layman language.

I am also having another query. I have created a Batch BOM of 45000 Quantity. WO also created for the Same Quantity of 45000. I have completed the WO with superbackflush option. I have not made any changes on Material issue or Hours & Quantities screen & completed the WO by simply submitting Next Option. But then also here you can see in the above screen there is a difference in Actual Units & Amounts.