Robert Thumme owns a $140,000 townhouse and still has an unpaid mortgage of $110,000. In addition to

Question:

Robert Thumme owns a $140,000 townhouse and still has an unpaid mortgage of $110,000. In addition to his mortgage, he has the following liabilities:
Visa....................................$565
MasterCard.............................480
Discover card...........................395
Education loan.........................920
Personal bank loan.....................800
Auto loan.............................4,250
Total.................................$7,410
Robert's net worth (not including his home) is about $21,000. This equity is in mutual funds, an automobile, a coin collection, furniture, and other personal property. What is Robert's debt-to-equity ratio? Has he reached the upper limit of debt obligations? Explain.