1099-DIV tax exempt interest question

Hoping to get answer from JPM but thought I might get one quicker here:

My 1099-DIV shows lines with Transaction Description EXEMPT DIVIDEND and then lines for the same holding with Transaction Description EXEMPT DIVIDEND, AMT. Is the latter the amount subject to AMT or the amount exempt from AMT? And do the amounts on the lines without the AMT suffix include the amount on lines with the AMT suffix? Is there an explanation of the Transaction Descriptions column available somewhere?

The 1099 has some explanatory info for the IRS boxes but not for the detail breakdown.

Thanks!