Answer:
The ground shipment option is more economical
Step-by-step explanation:
The costs of each option of shipment would be a good starting point in deciding which is more economical
Ground shipment costs:
Cost per day $21.09
number of days
cost=$21.09*3
=$63.27
Air option
Number of days 2
cost per day $21.09
additional charge
cost=standard charge* days+additional charge
=($21.09*2)+$30.00
=$72.18
Above all the ground shipment option of $63.27 is more economical compared to the air option of $72.18