The purchase cost of a new distillation column is $\text{Rs. 10 lakhs}$ with an installation factor of $5.8.$ The cost of the capital is to be annualized over a period of $6$ years at a fixed rate of interest of $5 \%$ per annum, compounded annually. The annual cost $\text{(in lakhs of rupees)}$ of the installed capital is________________ (rounded off to one decimal place).