Calculate the Date Time Difference by including working hours only from 09:00 AM to 06:00 PM and excluding Friday's

Calculate the Date Time Difference by including working hours only from 09:00 AM to 06:00 PM and excluding Friday's

I want to Calculate the Date Time Difference by including working hours only from 09:00 AM to 06:00 PM and excluding Friday's in zoho reports. Please help me how can I do that.


Thanks