D&B management is considering a proposal to design a modular power plug connector so that only the base unit $($device without the power plug can be sourced from the Taiwanese supplier, and the power plug can be assembled at D&B$\text{'}$s own processing facility near Hamburg, Germany. Proximity of this facility to an established seaport will also enable D&B to use ocean shipping from Taiwan instead of air freight$).$ Ocean shipping would cost only $$2$ per item, but have a lead time of $10$ weeks on average with a standard deviation of $1$ weeks. The final assembly operation and additional transportation $($from the Hamburg facility to the DC in total would cost $$65$ per item, but the manufacturer's price would be lowered to $$(220-$ Vs$).$ The holding cost rate for the base unit will drop to $20\%,$ and D&B will keep using the same periodic review policy. Assume that D&B will be able to negotiate to take ownership of these items shippr via ocean only on delivery.c$)[10]$ Using the values you've calculated, accurately describe D&B$\text{'}$s inventory ordering policy for the base unit.d$)[15]$ What is D&B$\text{'}$s total annual cost of Model SF$3$ with postponement? Does it make sense to implement the postponement idea?