the count of 2 fields

[pbucc]

hi there,

i am having a problem trying to get the count of 2 fields.

field1 is a number like: 76

field2 is a number like: 150

both of these fields will be multiple of 51 to 175 or 1026 to 2000. field1 will always be the lower number.

as with the example above the answer is 75 (actually 74 but i need to work in 25's... 1 to 25, 26 to 50, 51 to 75... and so on)

this is for a color code solution for phone cables... and the pairs run in groups of 25.

any help would be great.

thanks

[*susan*]

do you always have to round up? or do you round to the nearest 25?