American Business Services introduced a new machine on January 1, 2016. The machine carried a two-year warranty against defects. The estimated warranty costs related to dollar sales were 3% in the year of sale and 5% in the year after sale. Additional information follows:

Year	Sales	Actual Warranty Expenditures
2016	$50,000	$900
2017	$80,000	$4,200

If American Business Services considers these warranties to be assurance-type and accounts for them by accruing the expense (and the related liability) in the year of the sale, what amount relating to warranties should be reflected on the December 31, 2017, balance sheet?

a. $5,300

b. $6,400

c. $6,500

d. $9,100