‘But I can’t reckon it; will you?’
‘Eleven pounds and sixpence, is it?’
Am I right supposing that this (the form ‘wil you?’) is a (informal) request for action? (And ‘reckon’ here means ‘calculate’ :shock:)
Can I express the same content by the phrase: ‘As I can’t , may be you will make a try to do that (instead of me)’?