Terri computed the pre-determined overhead rate. She estimated that 440,000 direct labor hours were going to be used for the upcoming year. Her boss wanted her to change the estimate to 420,000 direct labor hours even though he knows that this amount is probably going to be wrong. 1) What is the effect of changing the estimated direct labor hours on the pre-determined overhead rate computation? 2) Should Terri change the estimated direct labor hours to 420,000? Why or why not?