Utah Co. sold merchandise to Big Sky Corp. on December 1, 2017, for $9,000 and accepted a promissory note for payment in the same amount. The note has a term of 90 days and a stated interest rate of 8%. Utah's accounting period ends on December 31. What amount should Utah recognize as interest revenue on December 31, 2017 (if a 360-day year is assumed)?

a.$60

b.$120

c.$0

d.$180