Kindly answer this asap, and please also show excel working formulas, I'll give you an upvote and 5 stars rating.

9.3 Blaymount Amateur Dramatic Society is staging a play and wants to know how much to spend on advertising. Its objective is to attract as many people as possible, up to the hall capacity. For the past 11 productions their spending on advertising (in hundreds of pounds) and total audience are shown in the following table. If the hall capacity is now 300 people, how much should Blaymount spend on advertising? Spending 3 2 2 6 4 Audience 200 250 75 425 125 300 225 200 300 400 275