"The Bolt starts at $37,495 in LT trim, but a $7500 federal tax credit will pull the price under $30,000." I don't understand this because the last time I went

"The Bolt starts at $37,495 in LT trim, but a $7500 federal tax credit will pull the price under $30,000." I don't understand this because the last time I went into the VW dealer they had the MSRP of the e-Golf crossed out with a sharpie, and the price was written in higher, by the exact sum of the state and federal credits. How can the buyer expect to capture all of the federal incentive?