Add a same value across selected time period

Hi,

I have a per day project cost for different organization. This project has a start date and an end date. I found out how to visualize the per- day project cost across its course of time (i.e. from start date to end date) by creating a measure:

Amount = CALCULATE(SUM('Table1'[Per Day Cost]),FILTER('Table1','Table1'[Contract start date]<=MAX('Calendar'[Date]) && 'Table1'[Contract end date]>=MAX('Calendar'[Date])))

But I am unable to add its cost over its course.

For example:

If project has per-day cost 5000 from 1/1/2016 to 12/30/2016, it shows a constant line of $5000 between those dates.

In the figure below

Now, I want to calculate a cumulative cost incurred by a project in a time period selected by me from the calendar. For example:

The project A will have a total cost of 5000*30=150,000 from 1/1/2016 to 1/30/2016. Is there any way that I can do that in power BI? Is there a possibility that we can create a sum measure over an existing measure?

I have attached the .pbix file for your reference:

https://drive.google.com/drive/folders/1WTPYJCLYDjJcoaf8dr8q4gPAk1X5H22w?ogsrc=32