Mowers Inc. makes mowers for commercial landscapers. Their sales budget is shown below:

Sep sales, units $10,000$

Oct sales, units $30,000$

Nov sales, units $40,000$

Management want enough mowers on hand to meet $10\%$ of next month's sales.

Each mower requires $2$ cutting blades. Management wants enough blades to meet $15\%$ of next month's production needs.

What is the material budget for blades for September $($in units$)?$

Enter as a whole number, no commas and no dollar signs.