Clarksville Timber purchases material from a supplier who requires payment at the end of 40 days and gives a discount of 1.5% if payment is made within 10 days. Assuming 360 days in a year, the implicit interest cost of not paying on day 10 and making the payment on day 40 is closest to which number?

	A.	18%
	B.	19.89%
	C.	13.5%
	D.	18.27%