CREATE TABLE table_21573 ("No." FLOAT, "Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT, "Winners share  (  $  ) " FLOAT)

How many winning scores were there in the rr donnelley lpga founders cup?
SELECT COUNT("Winning score") FROM table_21573 WHERE "Tournament" = 'RR Donnelley LPGA Founders Cup'
SELECT COUNT("Winning score") FROM "table_21573" WHERE "Tournament" = 'RR Donnelley LPGA Founders Cup'