I've had type 1 for 25 years, and used a pump for the last 12.
Unlike what some others have said here, I still weigh pretty much everything at home, because guessing for things like bread and noodles and such like is just too prone to getting it far too off, and massively high or low blood sugar as a result of guessing it wrong is not a whole lot of fun, particularly in a situation where it could have been avoided.
So I guess I'm defending the OP, in that keeping close track of how much carbs a food contains has remained a priority.
But the main reason that I'm writing here is the OPs comment, later, about giving the insulin before the food is eaten, and that her daughter doesn't always eat.
Back when I was on injections, and not on fast acting insulin, I'd order in a restaurant, give the insulin - which with slower acting insulin should ideally have been 20 minutes before eating if my blood sugar was not too high or low in the first place - then wait for the food to come. And occasionally, after 20 minutes, the food hadn't come, but the insulin is already starting to work. After 40 minutes, the food still hadn't come, and I'm eating sweets and sugar so that my blood sugar doesn't sink too low, and I am not having any enjoyment whatsoever from this eating out malarkey... In fact, all i'm worried about is potentially passing out, and when the food finally does come I definitely can't enjoy it.
By giving her a bolus before she's eaten, without knowing for sure if/how much she will eat you are essentially re-creating that level of meal-eating stress at home. Sure, giving the insulin before the meal would give slightly better blood sugars, but if your daughter is at a stage where she will not necessarily eat , or won't all of what is being given her, you have raised the stress of the meal massively compared to eating and then, after that, giving an amount of insulin that corresponds to what was or was not eaten. It's not ideal, but pretty much nothing with T1 is ideal. Truly, you have to do what is least bad. And, if your daughter is not cooperating with meals, then insulin after eating IS least bad.
Back on the original topic. I've been in similar situations. Have always paid the full price for something, then either asked for a half of it - while paying the full price -, or got rid of half of it myself. In the long run, any other way has just been too much hassle.