Zephyr Sales Company has currently reported sales of $1,500,000. If company expects its sales to grow at 7.5 percent annually, how long will it be before the company can double its sales? Use a financial calculator to solve this problem. (If you solve this problem with algebra round intermediate calculations to 6 decimal places, in all cases round your final answer to two decimal places, e.g. 5.45)

Time need to double its sales -?