- An electric company is charging its consumers based on the following table:
| Numbers of Units Consumed | Charges/Unit |
|---|---|
| For the first 200 units | 2.5 |
| For the next 300 units | 3.5 |
| Over 500 units | 5 |
Depending on the day of the payment, it will have a discount or a surcharge.
- If consumers pays within 15 days a discount of 10% is given.
- If consumers pays after 15 days a surcharge of 5% will be added.