1. **Problem 1:** How much interest will ₱26,700 earn at 3% interest per annum for 4 years? 2. **Given:** - Principal $P = 26700$ - Rate $r = 3\% = 0.03$ - Time $t = 4$ years 3. **Formula for simple interest:** $$ I = P \times r \times t $$ 4. **Calculate interest:** $$ I = 26700 \times 0.03 \times 4 = 26700 \times 0.12 = 3204 $$ 5. **Answer:** The interest earned is ₱3204. 6. **Problem 2:** How much commission will Joy receive for booking services worth ₱55,000 at 8.5% commission rate? 7. **Given:** - Total amount $A = 55000$ - Commission rate $c = 8.5\% = 0.085$ 8. **Calculate commission:** $$ \text{Commission} = A \times c = 55000 \times 0.085 = 4675 $$ 9. **Answer:** Joy's commission is ₱4675. 10. **Problem 3:** Clarisse buys food worth ₱855 plus 12% VAT. How much did she pay total? 11. **Given:** - Price without tax $P = 855$ - VAT rate $v = 12\% = 0.12$ 12. **Calculate tax:** $$ \text{Tax} = P \times v = 855 \times 0.12 = 102.6 $$ 13. **Calculate total amount:** $$ \text{Total} = P + \text{Tax} = 855 + 102.6 = 957.6 $$ 14. **Answer:** Clarisse paid ₱957.6 in total.