The production capacity is at about 750 units per day.

The monthly magazine is available for free with about 200.000 units per month.

"How do you control that when you're talking about 9,000 units?"

The company says it has sold about 40 units based on its design.

The system sold about 600,000 units in its first two days.

About 40 units have been sold that way so far, the building's sales agency said.

Once in use, it will produce about 2400 units of electricity each year.

The advertising helped the company sell about three million units last year.

Total sales for this year are expected to reach about 10.5 million units, according to the report.

But the preference is to build a 45- to 50-story building with about 800 units on that site, he said.