A firm practices a level strategy based on the next year's quarterly demand. With an initial inventory level of $0,$ demand over the next four quarters is estimated to be $400,800,1,000,$ and $1,200.$ Inventory carrying cost equals $$14$ per unit per quarter. Over the next year, what will be the sum of inventory carrying costs?

A$.$ $$0$

B$.$ $$11,900$

C$.$ $$18,200$

D$.$ $$47,600$

E$.$ $$7,000$