12. A salesman has a basic salary of P3 500. He gets a commission of 5% on all sales above P50 000. How much did he gets in a month when his sales amounted to P264 600?
a. P12 300
b. P16730
C.P17 630
d. P18630

13. If the value of three squared is nine, what is the value of four cubed?
a. 64
b. 54
c. 150
d. 158​