Parents requests child to get more food.

[Rachael]

Just be honest with her....Tell her that due to an error which was wholly your naivety, she is being undercharged considerably but you have honoured that error because it was your fault. However, because of this, you are being paid $4,800 a year which is half what she should be paying and after expenses like food, milk, etc, you are actually left with nothing as profit.

Now, she is asking that you increase your costs associated with her custom which will mean it is actually costing you money to care for him.

Then give her the option - she can have the increased volume of food, if she pays the market value for the place. However, it's too disruptive to feed him hourly so you aren't willing or able to do that so he'll need to eat more at the designated times and she'll need to provide the extras OR she can provide ALL his food so at least you aren't having his food costs on top of your huge losses.

Which deal would she prefer?