A company offers a cash rebate of $1 on each $4 package of light bulbs sold during 2010. Historically, 10% of customers mail in the rebate form. During 2010, 4,000,000 packages of light bulbs are sold, and 140,000 $1 rebates are mailed to customers. What is the rebate expense and liability, respectively, shown on the 2010 financial statements dated December 31?