Drug Price Question

What the heck is going on here? I don't use a lot of prescripts, and this is a new one. So, how the heck can a script be "worth" almost $600, but because I have insurance I can buy it for under 10 bucks? Who the hell is paying the difference, or who the hell is taking it in the *** for the difference? Somethin' ain't right!20200401_173218.jpg