The right chart to indicate subscription increase and decrease

After listening to The Right Chart, I figure this is a great place to ask my question. I need a chart for a report, not for a presentation, so the amount of detail it needs to convey isn't limited to what can be absorbed from a projector in half a second.

That said, I want a chart that can quickly and simply convey what needs to be conveyed.

Normally I'm good at this -- I design all our customer reporting and recieve rave reviews -- but this internal one has me stumped.

We're a Widget Subscription company. You subscribe to our service and get a number of widgets each month.

• Baseline: We sold 100,000 WidgetOnes last month.
• New Sales: We got 2 brand-new customers this month and sold them another 2000 WidgetOnes.
• Increased Sales: Some of our existing customers increased their subscription and we sold them another 2000 WidgetOnes
• Cross Sell: Some of our WidgetTwo customers decided they'd like to get WidgetOne as well and so we sold another 2000 WidgetOnes to them
• Lost Customers: Some of our customers left us for a competitor so we lost 1000 WidgetOne sales
• Decreased Sales: Some of our existing customers don't need as many this month so we lost another 1000 WidgetOne sales
• Product Dropped: Finally, some of our customers decided WidgetOne wasn't for them, but they'd keep their WidgetTwo subscription. Another 1000 lost here.

All that means that this month we have sold 100,000 + 2000 + 2000 + 2000 - 1000 - 1000 - 1000 = 103,000 WidgetOnes this month.

How do I indicate this on a chart?

A huge aim here is to present a chart that immediately-at-a-glance shows the start of the month and the end of the month. But that when you look closer, there's more detail available.

I considered some sort of column chart with increases above the X-axis and decreases below it, but that doesn't fullfill the main goal as it wont indicate the 'baseline' or nett change very well.

A stacked column does this perfectly ... if there's only ever increases.

Any and all suggestions gratefully received.

Cheers!
Rick