>, and all that's needed for destination is a box for postal code. There can also be differences of shipping costs for delivering to a business vs a residentia

>, and all that's needed for destination is a box for postal code. There can also be differences of shipping costs for delivering to a business vs a residential address. I've seen shipping costs go up by $3+ when shipping to a buyer's home address instead of his office. The zipcode isn't granular enough to differentiate that. I believe 2 factors contribute to the extra costs: 1) UPS trucks don't drive the residential streets as often as the main roadways where all the businesses are located and 2) many failed deliveries and repeated attempts because recipient isn't at home -- which costs more in gas, driver hours, etc