Your regular customer has approached you asking for an ocean freight rate for $10$ cartons of hand tools, from Calgary to Dusseldorf, Germany. The carton dimensions are $18$ in $12$ in $12$ in$,$ and each carton weighs $6kg.$ You have been able to determine the following:

a$)$ Ocean freight:

Pre$-$carriage: CFS Calgary $-$ CFS Montreal: US $$\frac{85\mathrm{.}00}{m^3}($minimum $2m^3)$

Ocean freight: CFS Montreal $-$ CFS Dusseldorf: US $$\frac{165\mathrm{.}00}{m^3}($minimum US $$275\mathrm{.}00)$

Transit time: $21$ days