CREATE TABLE table_7544 ("Name" TEXT, "Date of Birth" TEXT, "Height" FLOAT, "Weight" FLOAT, "Spike" FLOAT, "Block" FLOAT)

What is the total number of Weight(s), when Block is 300?
SELECT COUNT("Weight") FROM table_7544 WHERE "Block" = '300'
SELECT COUNT("Weight") FROM "table_7544" WHERE "Block" = '300'