It's good to make extra money.
Roald is at work and the boss is letting the employees know that overtime is available this weekend and pays double.
Roald wants to make use of his weekend.
Roald signs up for the overtime to stay busy over the weekend because it never hurts to have some extra cash.
Roald doesn't think the overtime is worth the extra money, so he spends the weekend drinking with his buddies.
Roald is able to save more money for a rainy day than he would have been able to with his normal hours.
Roald spends more than he planned and regrets not working the overtime for the extra money he could use now.