$7$

a$.$ Unrecorded depreciation on the trucks at the end of the year is $$6,584.$

b$.$ Total amount of accrued interest expense at year$-$end is $$8,000.$

c$.$ Cost of unused supplies still available at year$-$end is $$600.$

I HAVE ALREADY TYPED IN MY ANSWERS I JUST WANT FOR THEM TO BE CORRECTED