Currently, Sheet Music Direct rounds prices up/down to the closest $0.99 USD increment to align with Apple price tiers. If the price you enter in your ArrangeMe account ends with $.29 or higher, the price is rounded up; if it ends with less than $.29, the price is rounded down.
Sheet Music Plus currently sells titles for the price you enter at ArrangeMe.
Note that digital retailers may offer discounts or other promotional pricing at any time and you will always receive your commission percentage based on the sale price.