If statement not working

Hi there,

Ive implemented IF statement to evaluate 3 items (height, width, depth) according to their input and it will display a results.

Ex:
Width: <= 1.524 & Height <= 2.743 & depth <= 1.524, the calculated field will display 1 ton as a result..

this is my code im using but its not executing:

function(){
if(fieldname10<=1.524 && fieldname11<=2.743 && fieldname12<=1.524) return “1 Ton”;
})()

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