Please solve

The marketing department of a company has determined that if it spends a thousands of dollars on radio advertisements and y thousand dollars on newspaper advertisements, the company's revenue (in thousands of dollars) will be R(x, y) = - 0.08x2 - 125y + 3x + 2y + 6xy How much money should this company spend on radio advertisements and newspaper advertisements to maximize its revenue? Radio: $ Newspaper: $