For this case we make a rule of three to find the cost of dairy products and vegetables.
$ 140 --------------> 1
x ------------------>
Where "x" represents the amount of money spent on dairy products.
So, I spend $ 20 on dairy products.
Now we have:
$ 140 --------------> 1
y ------------------>
Where "y" represents the amount of money spent on vegetables.
So, I spend $ 21 on vegetables.
Therefore, I spend $ 41 on vegetables and dairy products.
$ 140- $ 41 = $ 99
Spending $ 99 dollars on products other than vegetables and dairy products
Answer
$ 99