The accounts receivable or receivables are money owed to companies by   its customers (individuals or other companies) for products or services that have  been received. Usually a company sends an invoice to the customers who need to  pay it within agreed-upon time frame. Total and average accounts payable KPI is  accounting KPI that shows the total and average sum  of company assets that  should be paid to the company by its customers within certain period  of time. Among  the purposes  of using this KPI are the following: financial analysis, managing  accounting transactions such as billing the customer for products or services  ordered. 
   To calculate total and average accounts receivable KPI please follow the  steps below:
   - Create the custom field "Accounts    Receivable":
     
       - Go to: Tools/Custom fields and press "Ins" button
- In "Title" field enter "Accounts Receivable" 
- In "Code" field enter "cf_accounts_receivable"
- In "Type" field select "Currency" and click "Ok" button
 

   - If you need to view the total or average value  of this KPI per particular project on Task List, filter your to-do     list by task group with project tasks. 

   - To view the total or average accounts receivable     amount within certain time period set filter on Task List – Filters panel

   - Set footer:
     
       - right click under column "Accounts Receivable"
- select "Sum" to display total amount  of accounts receivable 
 

   
     - select "Average" to display average amount  of accounts       receivable 

   If you need to view the total or average value  of this    KPI on   Task Tree, please follow the steps below:
   - On Task Tree select root task group and select "Custom     fields options"

   - To enable the displaying  of the total or average accounts receivable select custom field    "Accounts Receivable" and  do the   following:
     
       -  select Enable
- check "Aggregated" (for task group)
- to display the total accounts receivable
         select "Sum" and the custom field name "Accounts Receivable"
 

   
     - to display the average accounts receivable
       select "Average" and the custom field name "Accounts Receivable"

   - Select task group for which you need to view the total or average accounts receivable, right click and select "Custom     fields options"

   - Select custom field "Accounts Receivable" and select     the option "Enable by parent". 

   
   Total Accounts Receivable per project on Task Tree
   
   Average Accounts Receivable per project on Task Tree