Amazon sales 2014 $88,988,000,000
Approx. # of orders @ $50/order avg 1,779,760,000
Approx.# of deliveries @ 50 orders per truck avg 35,595,200
Miles to deliver all 50 orders @ 250 miles/truck 8,898,800,000
Miles expressed in billions 8.90
Avg. fatality rate/billion miles* 11.3
Approx. annual lives saved if all orders delivered by drone 101
*Source:http://en.wikipedia.org/wiki/List_of_motor_vehicle_deaths_in_U.S._by_year