To make dynamic bucketwise report from Ageing report while providing days from form

Hello All,

I'm developing a dynamic bucket wise OS report maker from Ageing report wherein users enter the days through form and by clicking the button "Make Bucketwise", the bucket wise OS report will be generated (adjacent to the ageing report) as per the days provided by users. Here users may enter any day i.e say one may want to make report for bucket 0-21 days however another user may want to generate for 0-16,17-21 and so on. The number of columns in the ageing report is fixed however number of rows may vary. File along with the form screenshot attached.

I want to know, do I have to write code for every possible combination of bucket days or there is any other smart way to do this.

Also, if text box/es remain blank on the right side after entering days from the left side, code to run as per the days provided and do not show error, however, there should be at least 2-3 text boxes to be filled by users starting from the left side.

Any help will be much appreciated.

I tried to write code for two text boxes and that too from Day 0 to Day 10, the last code is written for three text boxes which is for Day 0 to Day 5, Day 6 to Day 10 and Day 11 & Above.

Can anyone see this code and assist me in optimising it as I'm wondering there must be any other way round to do it because it needs to be written for a combination of Day 0 to Day 120 Plus into 7 textboxes.