The estimates are for  30 speakers while total participants number 60.0 
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Foreign speakers travel costs (14-16): $14000.00
Student participants travel costs (14-16): $4000.00 
Accomodations for speakers for 4 nights at 46.20 per plus taxes: $5932.08 
Reception at $5.65 per  $339.00 
Coffee at $2.55 per  $459.00 
Breakfast at $9.00 per $1620.00 
Lunch at $12.50 per $2250.00 
Banquet at $20.95 per plus $65 setup cost $1322.00 
incidentals (publishing, tags, etc..): $1030.00 
streaming video record: $1000.00 
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Total costs $31952.08