AutoCAD 2010 :: Formula In Table - Convert Negative Result To 0 (zero)

I am setting up a table to automatically calculate plumbing fixtures based on occupancy count.The problem I have is creating a formula for plumbing fixtures for B occupancy where toilets are required at 1 per 25 for the first 50 occupants and thereafter 1 per 50 occupants. (International Building Code)

A simple formula for 1 at 25 would be "value/25" whereby the value would be a cell content (occupancy number).

Taking this further with a formula like "(value-50)/50+(value/25)" works fine as long as the value (occupancy) is greater than 50.

If the value is less than 50 the first part of the formula (value-50)/50 creates a negative result.

Is there a way to convert a negative result of the first part of the formula to a 0 (zero)