Mary Kim invested $970 in 17 shares of stock. A month later, she sold the 17 shares at $60.63 per share. She also invested in 250 shares of stock for a total of $22,162.50. She sold this stock for $81.19 a share and paid $520 in total commissions. What was Mary Kim's profit or loss on the transactions to the nearest dollar?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?