You are given the following information concerning how a change in sales force effort impacts sales: ■ A 50% cut in sales force effort reduces sales to 48% of its current value. ■ Sales force effort...

You are given the following information concerning how a change in sales force effort impacts sales: ■ A 50% cut in sales force effort reduces sales to 48% of its current value.

■ Sales force effort of 0 reduces sales to 15% of its current value.

 ■ A 50% increase in sales force effort increases sales by 20%.

■ A saturation of sales effort (a 10-fold increase) increases sales by 35%.

Fit an S-shaped curve as described by equation (8.1) to these data.