Business opening hours

a) Opportunity cost refers to the cost of the next best alternative that is foregone in a decision. In this case, it refers to the loss income by not opening supermarkets on Weekends.

b) Illustration of opportunity cost mentioned include

• Loss of supermarket sales by not operating on Sundays or weekends or by not operating "24-hour stores".
• Banks potentially losing clients on Weekends.
• Fines for refusal.

These factors will obviously affect commerce decision making, e.g. whether to do business on Sundays or 24-hour a day.