CREATE TABLE table_8472 ("South or west terminus" TEXT, "North or east terminus" TEXT, "First year" FLOAT, "Final year" FLOAT, "Notes" TEXT)

What is the total of Final year that has a Notes of replaced by i-96?
SELECT SUM("Final year") FROM table_8472 WHERE "Notes" = 'replaced by i-96'
SELECT SUM("Final year") FROM "table_8472" WHERE "Notes" = 'replaced by i-96'