Walmart Canada sells a four-bar milk chocolate Kitkat for CA$3.86 at a rate of $2.14/100g. To reach a value of $3.86, a Kitkat must have a mass of 180.35~g.
Let's hop back to 2016 for a bit and discover that CA$1 was worth US$0.74 at the end of 2016 so that brings us to US$2.85~ for the Kitkat, and adjusting for a 7.17% increase in prices and 0.07% inflation, we reach a price of $2.47~ per Kitkat.
If we consider that in 2016, the Americas made up for 40% of Kitkat sales at an estimated revenue of US$7 million, we can determine that 1.133 million Kitkats were sold in the Americas.
If the USA consumes 11.64 lbs of chocolate per capita annually, we can use our previous findings to determine that 0.0014 lbs of Kitkats are consumed on average in the USA.

If you don't intend to buy a Kitkat, yes you should.