I'm sure this is ridiculously simple, but for the life of me I can't figure it out. If I have tabular data in my source, where salesperson can be different every week. How can I create a chart that shows both everyone's numbers as a separate trend line?

Code:
var store1 = new Ext.data.JsonStore({
        fields: ['salesperson','name', 'data1'],
        data: [
                {salesperson: 'Billy', name: 'Jan', data1: 10},
                {salesperson: 'Billy', name: 'Feb', data1: 20},
                {salesperson: 'Billy', name: 'Mar', data1: 30},
                {salesperson: 'Billy', name: 'Apr', data1: 40},
                .
                .
                .
                {salesperson: 'Dee', name: 'Jan', data1: 50},
                {salesperson: 'Dee', name: 'Feb', data1: 60},
                {salesperson: 'Dee', name: 'Mar', data1: 70},
                {salesperson: 'Dee', name: 'Apr', data1: 80}
        ]
});