If there is a 20% markup:
To find 20% of 489, you would need to do 489 x 0.2. This is 97.8. Add 97.8 onto 489 to get your answer, which is 586.8.
If there is a 60% markup:
To find 60% of 489, you would need to do 489 x 0.6. This is 293.4. Add 293.4 onto 489 to get your answer, which is 782.4