Help with Formula for Days in AR

Hello!  

Yes.  When you divide " $593,560.15" / "$ 8,966.86"  the answer is "66." In BI, when I using the below formula it gives me 45.  I am using the following formula:

AR Days = DIVIDE([Total Balance], [Avg Charges], 0)  *Using the following Filter Date: (Relative Date is in last 6 months)

Here are the other forumula I used:

1. Total Balance = SUM(Charges[Balance])

........Total Balance (which is also known as "Total AR")

2.  Last 6 month Charges= CALCULATE([Total Charges], DATESINPERIOD(_Calendar[Date], MAX(_Calendar[Date]), -184, DAY))  ....I didn't know how to go back 6 months so I just used "184" days.  I know sometimes it may not be 184 days but at least I got something in the meantime.  *Using the following Filter Date: (Relative Date is in last 6 months)

3.  Avg Charges = DIVIDE([Last 6 month Charges], COUNT(_Calendar[Days in Month]),0)

*Using the following Filter Date: (Relative Date is in last 6 months)

Hope this helps