Remember that package delivery peaks in December before Christmas--yet the package industry can handle this peak. So let's say December volume is 100x units of

Remember that package delivery peaks in December before Christmas--yet the package industry can handle this peak. So let's say December volume is 100x units of which UPS handles 40x--leaving the rest of the industry handling 60x units. And normal August volume is 60x units. Thus the rest of industry can handle this (with overtime, part-time workers...). And business will do things like consolidate orders [ever order a half dozen things from Walmart and it comes in more than one package (from different distribution centers)].