olton chairman Phil Gartside has called for limits on Premier League wages and admits he may have to sell Gary Cahill and Johan Elmander.[LNB] The club's losses have more than doubled to £35.4million, with their debt rising from £64million to £93million, and Gartside said England defender Cahill may be sold in the January transfer window if they receive an offer in excess of £15million.[LNB]Gartside, also a long-serving FA board member, said wage restraints were needed.[LNB]He told Bloomberg: "Owners should be allowed to invest in equity. So if you, as an owner, want to buy a striker for £10million that shouldn't be a problem.[LNB]"But what you then can't do is pay him extortionate wages that take you out of the break-even situation.[LNB]"We are carrying too many on the wage bill.[LNB]"To be fair, nine players are out of contract in the summer, within them heavy earners, and we'll decide if we want to offer them new contracts."[LNB]Gartside said the transfer window may be the best time to receive an offer for Cahill.[LNB]He added: "If a Champions League team knocks on our door in January that's the best time to sell an asset because Champions League teams will pay the money."[LNB]On 29-year-old Swedish striker Elmander, Gartside said: "He's out of contract at the end of this season and again if someone knocks on the door in January then that's obviously a consideration we have to make."[LNB]The Bolton chairman also believes the Premier League's chief executive Richard Scudamore wants even tougher rules on club finances.[LNB]"Richard's keener than anybody," Gartside said. "I think he's concerned as much as anybody about the financial state. We keep upping the income and we keep losing more money. It's ridiculous."[LNB]Bolton's financial position is not as precarious as was Portsmouth's when they went into administration owing more that £120million because the Wanderers' owner Eddie Davies is owed the bulk of the debt.