>hello,
>
>thank you for reply,
>
>i want to know if you runing the form.
No, let's concentrate on the table structure first.
>the arabic field is something like a car you must paid some mony every year like insurance.....etc.
OK. It seems, then, that you need monthly prices for each car separately. As I wrote, I think it is more efficient to store information only for the months where you have changes. Then, create a lookup function that searches for the month. If it doesn't find the month, search backward to the closest month.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)