The total value created from this trade can be calculated by subtracting the value of the bicycle to you from the value of the bicycle to your friend and adding it to the value of the bicycle to you.
The value of the bicycle to you is $25 and the value of the bicycle to your friend is $94.
Therefore, the total value created from this trade is: $94 - $25 + $70 = $139
So, the total value created from this trade is $139.