For 2019, selected results for a company are shown below: Price per unit Net operating income Degree of operating leverage $ 12 $ 10,260 2.5 With no change in price or cost structure, the company expects the following for 2020: Sales Net operating income $ 183,600 $ 10,773 Given the information above, the number of units sold during 2019 must have been: (All answers are whole numbers -- unless specified otherwise. You should NOT include the $ sign or a comma. E.g., you should type 1000 for one thousand. Negative numbers should be added with a minus sign, e.g., -1000 for a decrease or loss of one thousand.) Sales units in 2019 =