On $1$st April, $2016,$ ABC Ltd$.$ purchased a machinery for GBP $52,000$ and spent GBP $2,000$ on cartage, GBP $3,000$ on unloading, GBP $2,000$ on installation and GBP $1,000$ as brokerage. It was estimated that the machinery will have a scrap value of GBP $6,000$ at the end of its useful life, which is $10$ year GBP

On $31$st December $2016,$ repairs and renewals amounted to GBP $2,500$ were paid. On $1$st October $2018,$ this machine was sold for GBP $30,600$ and an amount of GBP $600$ was paid as commission. Calculate the amount of annual depreciation and rate of depreciation