Guide questions: 1. How many possible number of face masks and face shields an online seller can sell to get an amount of at least P2 000 based on the data above? 2. How did you come up with the number of face masks and the number of face shields which will amount at least P2000? 3. Did you encounter difficulty in determining them? Why? 4. Does / the total amount decrease increase as the number of items decreases increases? 5. Are there other possible numbers of face masks and face shields that would still yield to an amount of at least P2000? How many combinations can you get?​