A survey asked a random sample of customers which of two products they preferred. The results are shown in the table below.
| Product | Preferences |
|---|---|
| Product A | 250 |
| Product B | 150 |
A total of 400 customers were surveyed. If a company expects to sell 10,000 units of these two products combined, what is the expected difference between the number of units sold for Product A and Product B?
1,250
1,875
2,500
3,125
