Since he only makes commission on sales over $1000, he makes commission on $1500 (we find this by doing 2500-1000.) His commission is 15%, so find 15% of $1500:

So we know how makes $225 in commission.
Now we need to add this to his fixed pay to get his total pay:

So his total pay is $525, which is answer 'a'
Hope I helped, and let me know if you have any questions :)
Answer:
Non-isosceles Trapezoid: "0" (No) number of lines of symmetry
Rotational symmetry order: 0 , Rotational Symmetry angle: none
Step-by-step explanation:
Non-isosceles Trapezoid: "0" (No) number of lines of symmetry
Rotational symmetry order: 0 , Rotational Symmetry angle: none
The answer is true to all of them.