CREATE TABLE table_59558 ("Season" FLOAT, "Year" FLOAT, "Mole" TEXT, "Winner" TEXT, "Runner-up" TEXT, "Total prize money" TEXT, "Potential prize money" TEXT, "Destination" TEXT)

When the Mole was Petrina Edge, what was the potential prize money?
SELECT "Potential prize money" FROM table_59558 WHERE "Mole" = 'petrina edge'
SELECT "Potential prize money" FROM "table_59558" WHERE "Mole" = 'petrina edge'