Winters Hardware Store completed the following merchandising transactions in the month of May. At the beginning of May, Winters ledger showed Cash of $10,400 and Common Stock of $10,400.

May 1		Purchased merchandise on account from Black Wholesale Supply for $7,750, terms 1/10, n/30.
2		Sold merchandise on account for $4,600, terms 2/10, n/30. The cost of the merchandise sold was $3,450.
5		Received credit from Black Wholesale Supply for merchandise returned $350.
9		Received collections in full, less discounts, from customers billed on May 2.
10		Paid Black Wholesale Supply in full, less discount.
11		Purchased supplies for cash $1,170.
12		Purchased merchandise for cash $4,030.
15		Received $299 refund for return of poor-quality merchandise from supplier on cash purchase.
17		Purchased merchandise from Wilhelm Distributors for $2,100, terms 2/10, n/30.
19		Paid freight on May 17 purchase $325.
24		Sold merchandise for cash $7,150. The cost of the merchandise sold was $5,330.
25		Purchased merchandise from Clasps Inc. for $1,040, terms 3/10, n/30.
27		Paid Wilhelm Distributors in full, less discount.
29		Made refunds to cash customers for returned merchandise $135. The returned merchandise had cost $96.
31		Sold merchandise on account for $1,664, terms n/30. The cost of the merchandise sold was $1,079.

Calculate the profit margin and the gross profit rate. (Assume operating expenses were $1,820.) (Round answers to 1 decimal place, e.g. 15.5%.) Profit margin % Gross profit rate %