A company offers a cash rebate of $2 on each $5 package of light bulbs sold during 2021. Historically, 10% of customers mail in the rebate form. During 2021, 4,000,000 packages of light bulbs are sold, and 190,000, $2 rebates were mailed to customers. What is the rebate expense and liability, respectively, shown on the 2021 financial statements dated December 31? $800,000; $420,000 $420,000; $420,000 $800,000; $800,000 O $380,000; $380,000