BERLIN — Volkswagen is looking at ways to cut costs and boost cash flow and could sell more shares if the price of clearing up a scandal over its rigging of diesel emissions tests puts its credit rating at risk. The German carmaker's supervisory board has discussed ways of strengthening its finances, but has not talked about selling assets or brands, two sources close to the board told Reuters. One said raising money by selling shares would become likely if the cash costs of the scandal exceeded a “critical level”, without elaborating. Volkswagen declined to comment. Europe's largest carmaker has admitted cheating in diesel emissions tests in the United States and Germany's transport minister says it also manipulated them in Europe, where Volkswagen sells about 40 percent of its vehicles. Volkswagen has said it will refit up to 11 million diesel vehicles containing software capable of cheating emission tests. It also faces potential fines from regulators and prosecutors, lawsuits from consumers and investors, and a possible hit to sales and prices from the damage to its reputation. — Reuters