OTL - Booking Timesheet hours for multiple expenditure type

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Hi All,

As per our business need in OTL the hours booked for a particular project and activity/task should be tagged to a particular expenditure type. Earlier we were having 2 expenditure types - Regular and Overtime but now as per business current budget model they will have multiple expenditure type mapped as per the task/activity. 

Please share some ideas how we can auto-populate the expenditure type in the Time Card as per the selected activity which will align with budget model or how we can achieve a link to expenditure type through Project and Activity/ Task so that it provides correct budget information at Oracle Projects end.