Tim Mattke Company began operations in 2012 and for simplicity reasons, adopted weighted-average pricing for inventory. In 2014, in accordance with other companies in its industry, Mattke changed its inventory pricing to FIFO. The pretax income data is reported below. Year, Weighted-Average, FIFO 2012 $386,900 $415,000 2013 400,000 430,100 2014 416,700 460,900 . What is Mattke