We can save time to eat each meal as much because you can eat during lunch time at your desk and you can continue to work at all without going out to buy food to eat elsewhere. Because they take so much work.
We can save a lot of food at each meal. Because you are able to eat during the lunch break at a desk. And can run on it without going out to buy food elsewhere. Because of the time consuming work.
We can save food in each meal as well. Because you can eat during the lunch break at the desk. And can do it without going out to buy food at the other.