Rabbi Shneur Zalman Fradkin of Lublin [1830-1902], A chasid of the Tzemech Tzedek and Maharash of Lubavitch, was chief rabbi in Polotsk and then Lublin. When he made aliyah to the Holy Land, he became a major rabbinical figure in the Jerusalem community.
In the first quarter of 2014, 198 million U.S. consumers bought something online, according to comScore's quarterly State Of Retail report. That translates to 78% of the U.S. population age 15 and above.
The Markup percentage is the percentage of the selling price not represented in the cost of the goods. So if the markup is 20%, then 80% of the selling price is the cost. Your cost is $938, so the $938/80% = $1172.50 would be the cost for a product with a 20% markup. The contrasts with the gross Margin percentage, which is the percentage by which you increase the cost in order to find the selling price.