CREATE TABLE table_10335 ("Year" FLOAT, "Park" TEXT, "Artist" TEXT, "Mintage" FLOAT, "Issue Price" TEXT)

What is the sum of all mintage created by Pierre Leduc?
SELECT SUM("Mintage") FROM table_10335 WHERE "Artist" = 'pierre leduc'
SELECT SUM("Mintage") FROM "table_10335" WHERE "Artist" = 'pierre leduc'