2.5*7 = 17.5. If it's easier for you, multiply 2.5 by 5 then add 2.5*2.
1 multiplication prop
2simplifying
3 Addition prop
4 simplifying
Ron would have to pay his broker $400 because 1.25 percent of 32,000 is 400
D is the correct formula that the model represents. Black represents negative values, while white represents positive.