This looks like an occasional interaction, something a sales manager would do once a quarter, may be. Also, it seems like a high-impact event (getting it wrong could have consequences).
In this situation, it's best to allow more options, more space and each step its own individual attention, just so the user is comfortable with the choices they're making. It's also good to repeat the information the user has entered, confirming their intent.
Is it safe to assume that your application would store the widgets the company's selling, somewhere in the database? Also, considering its sales targets we're talking about, a time allocation also seems like a given.
Given those two assumptions are correct, it might help to give the user a separate step where they could optionally, split the sales target into widgets.
With the time window already selected, a sales manager would intuitively know how to split their target into widgets.
So while the whole interaction might look longer, involving more screens to go through, it would also help the user understand what they did, and only go for optional steps if needed.