A company has $\displaystyle \${94080}$ to spend on the development and promotion of a new product. The company estimates that if $\displaystyle {x}$ is spent on development and $\displaystyle {y}$ is spent on promotion, then approximately $\displaystyle \frac{{{x}^{{\frac{{1}}{{2}}}}{y}^{{\frac{{5}}{{2}}}}}}{{30000}}$ items of new product will be sold. Based on this estimate, how much should the company spend on development so the maximum number of products can be sold?