Question 3·Hard·Probability and Conditional Probability

A botanical garden has 240 plants. Each plant is classified as either native or nonnative and as either flowering or nonflowering. For a plant selected at random from among the flowering plants, the probability that it is native is $\frac{3}{5}$. For a plant selected at random from among the native plants, the probability that it is flowering is $\frac{1}{2}$. There are 72 nonnative plants that are nonflowering. What is the number of native plants that are flowering?