You can fly from seattle to boise for $137.50, from boise to witchita for $92.50 and from witchita to austin for $162.50. use mental math to find the total cost of the flight from seattle to austin. $394.50 $392.50 $402.50 $391.50

That would be  392.50  

Salutations!

You can fly from Seattle to Boise for $137.50, from Boise to Witchita for $92.50 and from Witchita to Austin for $162.50. Use mental math to find the total cost of the flight from Seattle to Austin.

You need to just add all the of the costs.

Lets form this into statements

Cost of flight from Seattle to Boise =  $137.50

Cost of flight from Boise to Witchita= $92.50

Cost of flight from Witchita to Austin = $162.50.

Total cost of flight from Seattle to Austin = 137.50 + 92.50 + 162.50 = 392.50.

The total cost of flight from Seattle to Austin is $392.50.

Hope I helped (:

Have a great day!