I saw that too...I reckon it's 4221. I won't go into how I got that number, but briefly if you see the sixty, there's six AND sixty in one word, same as nineteen. then look for the roman numerals.....in sixty, theres 1X (9), 1 (1), and X (10), so in the word sixty, there's 6+60+9+1+10=86. go through the rest, and I came up with 4221. I'm probably hopelessly wrong, but it passes the time!
ps, I wouldn't waste a phone call on it!