CREATE TABLE table_51289 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

When the laps are 31 and the constructor was honda, what's the sum of all grid values?
SELECT SUM("Grid") FROM table_51289 WHERE "Constructor" = 'honda' AND "Laps" = '31'
SELECT SUM("Grid") FROM "table_51289" WHERE "Constructor" = 'honda' AND "Laps" = '31'