Nestor R. answered 08/18/19
Statistician with a very good grounding in Algebra
Assume the sticker price of $29,000 includes the dealer markup.
If the markup was 20% then the sticker price is 1.2 x what dealer paid manufacturer.
This means the pre-markup price is $29,000/1.2 = $24,166.67
If the markup was 25% then the sticker price is 1.25 x what dealer paid manufacturer.
This means the pre-markup price is $29,000/1.25 = $23,200.00
Thus the dealer paid between 23,200.00 and $24,166.67 before applying the markup.