3. Aling Maria has a sari-sari store. She asked Mark to keep an eye on the
store and will be given 5% commission for his sales. Mark total sale is
1350. How much commission did he receive?

4. Jay bought pork for his pork chop menu. The pork in the supermarket
costs 250.50. A 2% sales tax was added to it. How much was the sales
tax? How much is the buying price of the pork?

5. Kristina borrowed 10,000 from her friend. She promised to pay after 1
year. What is the rate of interest if the amount of interest she borrowed is 500?