Suppose Apple produces 225 watches and each requires 2 oz. of a metal alloy to produce. The standard deviation of the watch price is 0.22 and the standard deviation of the platinum futures price is 0.35. The correlation between platinum futures and the watch price is 0.75. Suppose one platinum contract calls for delivery of 50 oz. of platinum. If Apple decides to cross-hedge the price risk of the metal alloy with platinum, how many contracts are needed to cross-hedge? Round to the nearest whole number