Silver Leaf, a retail bakery, traded two ovens having a total adjusted basis of $$680$ for a new oven costing $$1,320.$ They received an $$800$ trade$-$in allowance for the old ovens and paid $$520$ in cash for the new oven. The bakery also traded a used van with an adjusted basis of $$4,500$ for a new van costing $$9,000.$ They received a $$4,800$ trade$-$in allowance on the used van and paid $$4,200$ in cash for the new van. What portion of the new properties$$ bases qualifies for the Section $179$ deduction?

A$.$ $$0$B$.$ $$520$C$.$ $$4,200$D$.$ $$4,720$