List days capacity between two dates

I think I should have another column with the decreased capacity.

I think I didn't describe the problem properly, I'll try to describe it in a better way.

Let's say we manufacture chairs, we receive projects daily, each project has a set number of chairs.
Each employee can make 3 chairs per day, everyday they're at the office.

When I receive a project request to make 25 chairs from Feb 23 to Feb 26, I want my total capacity for those days calculated and the number of chairs required deducted sequentially from the daily capacity and stored in the sheet.
In the screenshot I wrote the numbers I expect the formula to provide.

• 23rd we'll do 9 chairs, so ending capacity is 0
• 24th we'll do 9 chairs, ending capacity is 0
• 25th we'll do the remaining 7 chairs,  ending capacity is 2
• 26th will remain unchanged since we finished the project the day earlier.

That way when we receive a new project, using the ending balance, we can automatically know if our remaining capacity can fit the new project or not.
The following assumptions stand:
- Projects are First come first serve basis - hence sequential deductions
- "Chairs" are identical to each other, and all employees have the same capacity to make 3 chairs every single day at the office. Projects differ in the amount of chairs only.

I appreciate your help since I've been stuck here for some time.

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Karim Gawish
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