HELP! Can't calculate MTD numbers way I want

[Nitrozbox]

Hi Everyone!

I am trying to calculate MTD total to show it on the graph along with daily numbers. Please refer to the screenshot attached below.

So assuming you have seen the screenshot,

I want this line, but along with it I want another metric like - on blank it will show 2L, then on 1 it will show 16 L(14+2), then on 2 it shows 32 L (16+16), then on 3 it will show 41 L (32+9) and so on for the whole month.

Now the issue is I have tried the MTD formulas available and they only show 41 L on every date instead of incremental MTD as I want.

Please help me, I know this is an easy fix but can't figure it out.

something like this