Formula to be executed on all records

I have added a formula to multiply quantity by the item cost. The formula works but I have to re-input the quantity for it calculate the value on each record. Is there a way that the formula can be forced to execute on all existing records?


You may use Formula Recalculation to apply the formula change to all saved records.

I have tried everything possible & still will not execute the formula please advise where I going wrong.

Ok so I deleted all records from the database and re-imported the csv file and selected execute formulas on import. Work around is fine.