on question 4 on f5 2010 june.my question is that how did we no that we are going to use decimal point on solution.like qa: under the existing policy;steel; 0.4/0,95 *4 1.68,other material;3*.0.9*0.1 .0.27, labour time 0.25 *10 2.50 etc.
As a general rule, if you are calculating costs per unit then you should work to the nearest cent (i.e. $0.01). If we are calculating total costs then we usually work to the nearest dollar.