Question 1074894
Divide their salaries by 1000, then add and you get:
15+12.5+7.5 = 35
840/35 = 24
Now:
24*15 = 
24*12.5 = 
24*7.5 = 
Multiply, use your calculator. That's how much each paid. Check your work, add up the products of your multiplications and you should get 840.