Using the information below, calculate the gross margin % (if necessary, round to the nearest tenth) NL Inc. Income Statement information the period ending 12/31/2021 Sales = $1,204,535 Cost of Goods Sold = $961,360 Selling, general and Admin exp. = $203,816 Earning from Operations = $1,369,416 0 79.8% 0 20.2% O 3.3% 113.7% O None of the above