A factory produces two types of widgets, Type X and Type Y. Type X widgets are produced at a rate of 50 units per hour, and Type Y widgets are produced at a rate of 75 units per hour. The factory needs to produce a total of at least 1500 widgets. Which of the following inequalities represents this situation, where $x$ is the number of hours spent producing Type X widgets and $y$ is the number of hours spent producing Type Y widgets?