DToys is planning a new social media and TV advertising campaign to reach people. A total budget of $30k is allocated to the campaign and the campaign must run on or within the budget. Moreover, to meet the development needs of the company, at least $10k must be allocated to each medium. It is estimated that every $1k spent on social media ad will reach 15 people and every $1k spent on TV ad will reach 10 people.

Show graphically and by using solver that the worth per additional $1k of budget is reaching 15 more people, which is the same as the number of people reached per $1k spent on social media ad. Interpret what this result means in terms of allocating additional budget.