a) We have that the discount is 65 %
Scott buys a jacket for $150
First, we will calculate the discount

then we need to subtract the quantity calculated above from the original price

After the markdown Scott paid $52.5
b.
In order to know the taxes first, we need to calculate the 5% of $52.5

then we will sum the 5% plus the price after the markdown

The total cost of the jacket is $55.125