Sarah has a digital step counter that records up to $9999$ steps, then resets to $0000$ on the next step. She uses it for her daily walks. On Monday morning, she sets it to $0000$. By the end of the week, the counter has flipped from $9999$ to $0000$ five times. On Sunday night, the counter reads $7500$. If Sarah takes $2000$ steps per mile, which of the following is closest to the total number of miles Sarah walked during the week?