What is the firm's current year net profit margin?

Category	Prior year	Current year
Accounts payable	41,400	45,000
Accounts receivable	115,200	122,400
Accruals	16,200	13,500
Additional paid in capital	200,000	216,660
Cash	???	???
Common Stock @ par value	37,600	42,000
COGS	131,400	173,915.00
Depreciation expense	21,600	22,283.00
Interest expense	16,200	16,311.00
Inventories	111,600	115,200
Long-term debt	135,000	139,515.00
Net fixed assets	378,407.00	399,600
Notes payable	59,400	64,800
Operating expenses (excl. depr.)	50,400	62,132.00
Retained earnings	122,400	136,800
Sales	255,600	336,493.00
Taxes	9,900	18,969.00

What is the firm's gross profit margin for the current year?