When exchanging US Dollars (USD) for Philippine Peso (PHP) the number of Philippine Pesos received is directly proportional to the number of US Dollars to be exchanged. If 450 USD can be converted into 16,006.05 PHP. Find the constant of proportionality k. Y (If needed, round answer to 3 decimal places.) Using the k from above find the amount of PHP given that you have 900 USD to convert. you will receive PHP (If needed, round answer to 2 decimal places.)