Can you replace the question mark with a number?

The flower vendor was usually an old hand at unloading his last few bunches. Appealing to a businessman on his way home, the vendor said, "How about a nice bunch of roses to surprise your wife?"
"Haven't got a wife," responded the businessman gruffly.
"Then how about some carnations for your girlfriend?" proposed the vendor without missing a beat.
"Haven't got a girlfriend."
"You lucky guy!" The vendor broke into a big smile. "Buy both bunches to celebrate!"