Which one was omitted 1. Toad Company, a retailer of X-ray machines for space stations, has noticed considerable fluctuation in its shipping expense from month to month, as shown below: Month Units Shipped Total Shipping Expense $2,200 January 4 $6,100 February 11 March 1 $1,000 April 4 $2,300 May 3 $2,200 $150,000 June 10 $4,800 July 8 $3,600 Required: Using the high low method, estimate what the shipping cost would be if the units shipped were 15. Show all work.