Leading contender for actual quote:
"... we expected to get orders for five [IBM 701] machines, we came home with orders for 18." "... we expected to get orders for five [IBM 701] machines, we came home with orders for 18."So they were counting on a 25% success rate and got 90%.
Compare it to ordering very high price items with long lead time like airliners, you pay for a specific delivery slot, not just the item at a random moment. And you can buy options to more deliveries in a specific timeframe, which influences the price of your order.