A Ltd buys a depreciable asset for use in its production process at the beginning of $2023$ financial year for R$200000.$ The estimated residual value of the asset was put at R$20000$ in the year of purchase. A Ltd Provides for depreciation over $10$ years according to the straight$-$line method. A Ltd has a $31$ December financial year.

$2\mathrm{.}2.$ Determine the depreciable amount. $(3)$