To amend the Agricultural Marketing Act of 1946 to improve the reporting on sales of livestock and dairy products, and for other purposes.

Mandatory Price Reporting Act of 2010 - Amends the Agricultural Marketing Act of 1946 to: (1) extend reporting requirements for livestock daily markets through September 30, 2015; (2) establish mandatory reporting for wholesale pork cuts; and (3) direct the Secretary of Agriculture (USDA) to establish, and implement within one year, an electronic price reporting system for dairy products.