Camping World purchased a new delivery truck on January $1,2023.$ The truck has a cost of $$44,400,$ an estimated life of $5$ years, and an estimated salvage value of $$8,400.$ What is the amount by which straight$-$line depreciation exceeds double$-$declining balance depreciation over the $5-$year life of the truck?

Select one:

a$.$ $$8,400$

b$.$ $$0$

c$.$ $$7,200$

d$.$ $$17,760$

e$.$ $$44,400$