Apple sold 6,500,000 songs through its iTunes Music Store in its first 61 days of operation, the company revealed last night during its third-quarter earnings call.

Though sales have slowed since the service launched, Apple sells an average 100,000 tracks per day. It also sold 304,000 iPods during the quarter, up from 80,000 units in the March quarter, and year-on-year. It shifted its one millionth iPod during the quarter.

Apple chief financial officer Fred Anderson said the company was "very satisfied" with its profit margin on iPods, even though this undisclosed margin is below that on other hardware. iPod demand was high during the quarter, meaning inventory was "constrained", he said.

The company expects its Windows digital-music service to be a "Trojan horse" in terms of selling iPods to PC users – the company hopes such customers will consider moving to Mac next time they upgrade their computer.

Anderson also revealed that music sales through the new Music Store is "close" to break-even, and reaffirmed Apple's intent to launch an iTunes Music Store Service for Windows "before the end of the year".

In response to analysts' questions, Anderson said he was optimistic for the future of the store, pointing out that only five per cent of US computer users can access the store – already close to break-even – at present. "At the end of the year the other 95 per cent will be able to get it," he said.

Apple didn't discuss any plans to introduce the service internationally. UK newspaper The Independent recently published a report citing Apple vice-president of European operations Pascal Cagni, who said the service "would not be ready by September". This is because of licensing complexities in Europe.