You can find this value in the "Gewinn- und Verlustrechnung" (Income Statement) under "Jahresüberschuss / Fehlbetrag" before tax adjustments.
This is a subjective value based on market conditions and industry standards.
This value can be calculated from the "Bilanz" (Balance Sheet) as "Summe Vermögen" minus "Summe Schulden."
Check the "Bilanz" (Balance Sheet) under "Verbindlichkeiten" for short-term and long-term liabilities.
Look for "Flüssige Mittel" (Cash and Cash Equivalents) in the "Bilanz" (Balance Sheet).