Can i plase get some quick assistance with this question? ill upvote for any swift response. Thanks!

A differential plecework scheme has a basic rate of $0-60 per unit. Output in addition to 500 units is paid at higher roles. The premiums over and above the basic rale, which apply only to additional units over the previous threshold ore! Output (units) Premium (per unit) 501-600 $0 08 above 600 $0:12 What is the total amount paid if the output is 620 units Select one: a. $382.40 b. $381.72 C. $310.40 od:5318.72