Daily sales project

I'm doing a project where I want to project daily sales until the end of the month, based on sales made to date.

Basically a sales trend for the end of the current month, but I'm having difficulties with how to create this temporal measurement.

I already have my sales table and another calendar, the final result I want is like this:

the white line is the designed design.

An example would be: It's been 2 days and we sold 100 reais, if the month goes until the 30th we will sell 1500 reais at the end of the month. But you want this daily view.