A healthcare facility has an average of 220 inpatient discharges each week. Assuming it takes an average of 20 minutes to code each chart, how many full-time coders are needed to code 220 charts? It is estimated that a 5-year expansion will require an additional 350 inches of filing space. Using the dimensions above (5-shelf unit, 35 inches per shelf), how many additional units will need to be purchased?