Please help The histogram below represents the number of people in different age groups who answered a survey

Order the age groups from the highest rate of response to the survey to the lowest rate of response.

Asalesperson set a goal to earn $2,500 in august. she receives a base salary of $1,000 per month as well as a 20% commission for all sales in that month. how many dollars of merchandise will she have to sell to meet her goal?