What would you do with $100 million? The Dodgers could use it as a down payment toward signing two of the three most dominant players in the star-studded free-agent class next winter. The Dodgers’ payroll-driven trade Saturday — in which they exchanged players with troublesome contracts for a player they might never activate — was designed primarily to free them from paying the luxury tax next year. The team was assessed a $36.2-million tax this year, based on a season-ending payroll of $253.6 million, according to a person speaking on condition of anonymity because those numbers have not been disclosed publicly. If the Dodgers can get that payroll below $197 million next year — as has long been their plan — they would pay no tax. Add that savings to the reported $50 million that each team is expected to receive from the sale of the league’s technology arm to the Walt Disney Co., and the Dodgers could have close to $100 million to save for a shopping spree next winter. The Dodgers run a disciplined business, focused on sustained winning through depth and player development rather than star power, wary of investing too much money into too few players who get too old toward the end of their contracts. On the other hand, as cable and satellite companies continue to lose customers, the Dodgers’ record-setting television contract might make them one of the few teams able to count on cable dollars for long enough to set the market next winter.