The answer your looking for is 5
The answer is 6$ because 50% of 40 would be 20 and 50% of 20 is 10 but when you all on the tax which would be around a dollar when you take 50% of 10 which is 5 and add on the tax which is a dollar you then get 6$ in total.
The answer is C I believe. I wasn't sure what exactly D was saying, but I am pretty sure the answer is C
