Exactly. And simply to have enough data to do some data mining on it in order to be able to answer questions like:
On which days do I spent most.
Do I spend more on the weekends on average than during the week.
How much money is left per month on average.
How much do I spent on food per week.
How much do I spent on bought food (e.g. From Thuisbezorgd) vs self made food.