Please show the proper way step by step how to do the calculation BASED ON AUSTRALIAN TAX.

Janice Quick purchased land in 1973 for $500,000. On 20 September 1985 , at a cost of $1 million, she commenced building a factory on which a deduction under ss 43-215 and 43-25(2) of Div 43 of ITAA 1997 (at 4\% pa) is available and was available under the corresponding Div 10D of ITAA 1936 provisions