How to chart 2 stacked bars per day?

I have four columns:

Ready Line, In-Process Lines, Ready Items, In-Process Items

Each has a value (0-200) for each day of the month.
This makes the data table for February 20 rows.

I want to graph the Ready and In-Process Lines stacked in one bar,
and the Ready and In-Process Items stacked in a separate bar,
so the graph will have two stacked bars per day.

Regardless of how I organize the data, or add empty columns,
or empty rows in between,
I always end up with a one stacked bar per day with all four values.

I looked at the link PTS Blog on clustered-stacked column charts,
but could not solve my problem.

Any help will be appreciated,

Alex