Answer:
$15 ; $15
Explanation:
Data Provided in the question
Willing to sell = $30
Agreed price = $45
Willing to pay = $60
So by considering the above information
The computation of gains from trade is presented below:
For Sophie
= Agreed price - willing to sell
= $45 - $30
= $15
For Ruby
= Willing to pay - agreed price
= $60 - $45
= $15