$[$Nvidia$]$ Nvidia has seen a recent stock surge and wants to hire more salespeople. They conducted a market environment analysis and found that they have $50,000$ customers, a call frequency of $10$ per year, an average call length of $90$ minutes, and $1,000$ hours of average selling time per year. According to the workload method, what is the number of salespeople Nvidia needs? $750045750,000$O $450$ There is not enough information