Excel Line Chart Only Unique Dates

Question

I have a set of data as follows:

Date    Amount
8/8/2013    $0.00
8/16/2013   $1.60
8/16/2013   $2.40
8/16/2013   $4.40
8/16/2013   $8.40
8/16/2013   $8.40
8/17/2013   $6.40
8/17/2013   $5.40
8/17/2013   $6.20
8/17/2013   $7.00
8/22/2013   $7.80
8/22/2013   $6.80
8/22/2013   $5.80
8/22/2013   $4.80

And I have a line chart set up to show the progress of the Amount over time. The problem I have is that the graph shows, for example, 4 different data points for 8/16/2013 instead of one.

I'd like the graph to display 4 data points, which will be the final amount for each unique date, as follows:

Date    Amount
8/8/2013    $0.00
8/16/2013   $8.40
8/17/2013   $7.00
8/22/2013   $4.80

How can I get the chart to do this?

Answer 1

Subtotal Amount for each change in Date, filter to select the subtotals, replace the first visible amount with something like =C2 and copy down to suit. Replace the text part of the Date Subtotal rows.