Answer please to mee

Cost of machinery = Rs. 50000
Total depreciation = Rs. 22500
Selling price of machinery = Rs. 30000
Book value of machinery on 30/06/2005 = cost - depreciation
=50000 - 22500
= Rs. 37500
Loss on sale of machinery= book value - selling price
=37500 - 30000
= Rs. 7500