A drug company believes its new drug will sell $10,000$ units in $2004.$ They expect two competitors to enter the market. The year in which the first competitor enters, the company expects to lose $30$ percent of its market share. The year in which the second competitor enters, the company expects to lose $15$ percent of its market share. The size of the market is growing at $10$ percent per year. Given values for the years in which the two competitors enter, develop a worksheet that computes the annual sales for the years $2004$ through $2013.$