A corporation recently issued $4 million of 10 year, 3% bonds at 101. There were 200,000 detachable stock warrants included as part of the sale. Each warrant allows the bondholder to purchase 1 share of no par common stock for $12 per share. On the date of issuance, the stock warrants had a fair value of $1 per warrant. By what amount did the corporation's long-term debt increase as a result of this issuance