Choose Copy prices from a plan I have. Pick the source in Copy from, tick the targets under Copy onto, optionally enter a percentage adjustment, and press Preview the copy. The preview shows every price row that will change before you confirm. Prices are rescaled by each target plan's billing period – copying a 1-week grid onto a 4-week plan multiplies accordingly, so a 4-week plan is not sold for one week's money. Bring existing plans in line works the other way: enter a price per category and Sprwt recalculates the plans you already sell to match.