Need to set a parameter inside a crystal report formula

I have a parameter in a crystal report for the end user to enter a number.  I want to pass this parameter to a formula that will be

if parameter > 0 then (parameter# * 35) + other field
else other field

I cannot figure out how to pass the parameter into the formula.
Tammi RushAsked:
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mlmccCommented:
Try this

If {?ParameterName} > 0 then
     {?ParameterName} * 35 + {OtherField}
Else
     {OtherField}

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To get the parameter into the formula just select it from the field list

mlmcc
Tammi RushAuthor Commented:
First it said I needed a string for the 0 so I put it in "".  

If {?Skids} > "0" then
{?Skids} * 35 + {SHIPMENT_BOL.WEIGHT}
else {SHIPMENT_BOL.WEIGHT}

then it tells me a number or currency is require at the parameter after the then
mlmccCommented:
Why is Skids a string and not a numeric parameter?

Use Val to convert it to a number

   Val({?Skids})

mlmcc

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Tammi RushAuthor Commented:
DUH!  It's those little things that will get you every time.
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