The data below is from the Statistical Abstract of the United States located on the Internet specifically from tables in the section entitled​ "Foreign Commerce and​ Aid." One of the tables lists U.S. exports and imports by selected Standard Industrial Trade Classification​ (SITC) commodity. Complete the Net Export column in the table below:(Enter all values as integers. Remember to include a negative sign where appropriate.)
Commodity Export Value Import Value Net Exports=Exports-Imports
($ millions) ($ millions) ($ millions)
Coffee 4 3,237
Corn 13,931 350
Soybeans 15,455 182
Airplanes 51,854 13,286
Footwear 673 19,545
Vehicles 98,871 190,799
Crude Oil 2,270 353,537