is a quarter of CPI and 40 percent of core CPI, which excludes food and energy prices.”
The phrase "which excludes food and energy prices" is applied to "core CPI", not the whole sentence. Do you need someone to show you how to diagram sentence structure?
Core CPI is reported, but it is not the Primary CPI which is reported as the headline, or used for social security and federal retirement benefits.
Maybe you need someone to explain to you what the whole article is about. Like I said it doesn’t matter if they report them or publish if they don’t use them.
p.s. if you really need someone to explain the article I will but I don’t think that’s the case is it? I know who you always agree with on site you two should post to each other.