I have pricing I send out on monthly basis to distributors. First column is the base price which could be $22.98, $19.01, etc. next column is the base price +$1.50, last column is base price -$1.50. How do I get the last digit in pricing to always be a 6, I.E. base price = $22.48 + first column =$22.24+$1.50 is $23.74 (4 needs to be a 6). Is this possible?