They are all formulas for financial software to get data. The previous QM definitely refers to the number at the end of the period. As for D and L in it, it's not clear, because each financial software has a different expression. You can look at the financial statements and edit the formula to see if there is any explanation. You can look it up, and don't edit the formula if you don't know it.
In addition, the ending balance of accounts receivable on the balance sheet is 625,000. You can also click on the formula in this cell, which is generally the ending balance of accounts receivable, that is, the debit balance. The ending balance of accounts received in advance is 420,000, which is a bit complicated. This is a liability account, but I specifically said that I would like to see the instructions for this account. Then look at how this subject is taken in the balance sheet formula.
You can look up the above two figures in the ledger (if any), but you can't see them. See if you didn't choose the right one during the accounting period, and see if you posted it. If they are on the balance sheet, they may also be amounts taken from other accounts.