problem: A firm sells computers at a selling price of $1,800 each. Each computer has a two year warranty that covers replacement of defective parts. It is estimated that 2% of all computers sold will be returned under the warranty at an average cost of $150 each. During November, firm sold 30,000 computers, & 400 computers were serviced under the warranty at a total cost of $55,000. The balance in Estimated Warranty Liability account at November 1 was $29,000. find out the firm's warranty expense for the month of November?