Calculating cumulative values in laravel

I am looking for a way to calculate cumulative of values of database in laravel.

Currently I retrieve a collection of values, one for each day. I would like to be able to show the cumulative value on the page. I want something like this

Code in my controller is : enter image description here

Here I retreive the values of fabrication and erection from form. I want to calculate cumulative of fabrication and erection value for each day...

via rabin senchuri