(1)The taxing of costs is a matter which has in the past received too little attention and Judges will find that the proper allocation of costs will be of great help in increasing the use made of Orders XI, XII and X1H of the Code. The mandatory provisions of Order XII, Rule 4, and Order XI, Rule 3, are often ignored. No cost should be allowed which appear to the court to have been incurred or increased unnecessarily or through procrastination, negligence or mistake.