must use Excel. please show work/equations used.

Nike has developed a new Nike Watch for its consumers. Considering the great popularity of other smart watches, Nike does not know how many they will sell. Purchase options are listed below for each order size. Assume a linear relationship. Units Cost Quote Small Order 5,000 $280,420 Small-Med Order 10,000 $520,300 Med-Large Order 15,000 $723,500 Large Order 20,000 $985,400 What is the Fixed Cost of the manufacturer? [ Choose ] What is the variable cost for this manufacturer? [Choose ] What is the total cost for 12 000 Units [ Choose ]