Be VERY careful about hiding prices shown in the BYO screen! Even if you pull CSS tricks to hide the text, the software records in the data file the information from the level-based prices for utility estimation. That means that for utility estimation, ACBC believes that attributes (with attached level prices) shown in the BYO had respondents trading off their preferences for those levels vs. the additional increases in price for getting those levels.
So, if you pull tricks like hiding the level-based prices in the BYO screen, you'll need to export the ACBC data to a .CHO file afterward and modify the BYO questions in the .CHO file to make it reflect what the respondent actually had seen on the screen. Otherwise, the estimated utilities will be biased.