Hi there!
To get your answer follow this:
$14 + $16 + ($1.25 × 2) + ($4.25 × 2) = $41.00
The pre-tax tip means you calculate the tip before the tax, like so:
$41.00 × (15% or 0.15) = $6.15
Now calculate the tax without adding the tip, like so:
$41.00 × (7% or 0.07) = $2.87
Now add both the tip and the tax amount to get the total, like so:
$41.00 + $6.15 + $2.87 = $50.02
And that is your answer!
Your friend, ASIAX