How can I set up so that it calculates Sales Per Day and I can still use filters?

[new_to_powerbi]

Sales Per Day = Sales / Days

Using the dataset below, how do I show that the Sales per Day = Sum(Sales) /  (31 + 28)?

Salesperson	Month	Days	Sales
Bob	January	31	200
Fred	January	31	100
Bob	February	28	100
Fred	February	28	50

[ryan_mayu · Accepted solution]

@new_to_powerbi 

you can create a measure

Measure = 
VAR tbl=SUMMARIZE('Table','Table'[Month],'Table'[Days])
return sum('Table'[Sales])/sumx(tbl,'Table'[Days])