A young college student on a tight budget is campaigning for an open city council seat. A friend in her economics class estimates that voters are influenced by TV and newspaper ads according to the following function: Votes = 300TV0.6 NP0.2, where TV represents the number of television ads and NP represents the number of newspaper ads. Thus, the marginal product of a newspaper ad is 60TV0.6 NP–0.8 and the marginal product of a TV ad is 180TV–0.4 NP0.2. A local television ad costs $400, and a local newspaper ad costs $250. If the candidate needs 1,800 votes to win, what is the lowest-cost combination of newspaper and TV ads that will bring her victory?