2 Unusual But Great Half Dollar Boxes

I wasnt going to buy these but glad I did. On the way to work I stopped at a bank that had 2 $500 boxes of halves, Box 1 - 1965,1966,3x 1967 all in one roll, second roll- 1960 D Franklin other 48 rolls junk ( dont understand how the 5 40%s got in one roll? ) 2nd box Roll#1 1964,1967,1968. Roll #2 1965,1968. Roll #3 1964,1965,1967,1968. Roll #4 1967 I found it unusual to have multiple silvers in a few rolls I asked them to order me 2 more boxes I guess I'm back in the half dollar game again