X Co. Ltd signed an agreement with its employees union for revision of wages in June,2004. The wage revision is with retrospective effect from 1.4.2000. The arrer wages upto 31.3.2004 amounts to Rs. 80 lakhs. Arrer wages for the period from 1.4.2004 to 30.6.2004(being the date of agreement)amounts to Rs.7 lakhs.