This model usually has department buttons for products, so the 110 code should work:
Turn key to program
110
.
X
New price (NO DECIMAL POINT e.g $5 = 500)
Press the department (item) button you want to change
TL (CASH button)
Make sure you have finished any sales in REG mode first as this is a common mistake. If you still have trouble, let me know.
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If anyone is looking for a Sharp ER-1970 manual, go here:
http://the-checkout-tech.com/manuals/cashregisters/Sharp2.php
Mark
June 2010