CREATE TABLE table_76211 ("Season" TEXT, "Series" TEXT, "Team" TEXT, "Races" FLOAT, "Wins" FLOAT, "Poles" FLOAT, "F/Laps" FLOAT, "Points" TEXT, "Position" TEXT)

How many races did the Formula Three Euroseries signature team have?
SELECT SUM("Races") FROM table_76211 WHERE "Series" = 'formula three euroseries' AND "Team" = 'signature'
SELECT SUM("Races") FROM "table_76211" WHERE "Series" = 'formula three euroseries' AND "Team" = 'signature'