Sierra's gross pay for this month is $7,550. Her gross year-to-date pay, prior to this month, totaled $143,500. Sierra's rate for federal income tax is 20%. Her voluntary deductions total $1,950. What is Sierra's net pay? Assume an OASDI rate of 6.2%, applicable on the first $147,000 earnings, and a Medicare rate of 1.45%, applicable on all eamings. Round any intermediate calculations to two decimal places and final answer to the nearest dollar. OA $3,764 OB. $5,714 OC. $4,090 OD. $6,040