Creating Run chart with monthly cost data at multiple locations

All, I am noobie trying to develop a "run chart" with cost data. Here is a screenshot of my data table below. 

I have 4 seperate locations (BMH, BBC, BLH, BSH) that have monthly cost data that is reported by therapeutic class. My goal is to develop a run chart that can aggregate this data into a monthly total of all four locations with all the classes combined. So the goal would be a trend line with monthly data points and a second trend line with the cost "goal" as a flat line that trends by month up to the total. 

Example: Say the cost of all sites per month is $100,000 in Jan $120,000 in Feb ect....and then have a trend line that averages 110,000 of cost each month which trends to a yearly goal of $1,320,000 ($110,000 x 12).

Can anyone help? Or point me to a reference? I am trying to learn