Varatta Enterprises sells industrial plumbing valves. The following table lists the annual sales amounts for every salesperson in the organization for the most recent fiscal year. Salesperson Sales Amount ($1000) | Salesperson Sales Amount ($1000) Joseph 148 Wei 466 Jennifer 233 Samantha 411 Phillip 548 Erin 297 Stanley 329 Dominic 320 Luke 294 Charlie 191 Lexie 195 Amol 212 Margaret 367 Lenisa 412 (a) Compute the mean (in $), variance, and standard deviation (in $) for these annual sales values. (Round your answers to the nearest whole number.) mean $ 316 variance 12515 x standard deviation $ 116 x