Between 300 and a 1000? So it could equally be 333 or 999,
That's some interesting math you have there.
The likelihood of 333 == 999 is slim at best.
It's as ridiculous as saying 300 (+/- 233%). And if you are a developer what could you possibly do with such a vague sales report?
Considering that being a programmer requires some foundation in math, I'd say most programmers could get a really good laugh from that.
Let's take a closer look.. You state that the range of 300 to 1000 is as ridiculous as saying 300(+/- 233%). I disagree wholeheartedly. The range of 300 to 1000 is clear and well defined. Your proposed replacement works out to a range of -399 to 999. Not only is that a bit low on the maximum end, but the possibility of selling -399 computers is well outside the original specification.
If you prefer a range by percentage, let's go with 650 computers (+/- 53.84615383%). That should get you much closer to the range you started with. It's not nearly as dramatic as your original range, but it's mathematically possible, at least.
They should focus on the positives; There's enough flag wavers out there. Well, somewhere between 300 and 1000 of them.
That depends on whose numbers you trust.