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 = 300 TV^0 · 6 NP^0 · 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 60TV^0 · 6 NP^- 0 · 8 and the marginal product of a TV ad is 180 TV^0 · 4 NP^0.2. 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?