Ghana wants more for its cashews, but it's a tough nut to crack

Ed ButlerBusiness reporter, BBC NewsReporting fromAccra, GhanaGetty ImagesCashew nuts, which grow from beneath cashew fruits, are a big export crop for GhanaThe Accra street vendor looks at me, bemused.I'm trying to establish how the rather flimsy 30g bag of roasted cashew nuts she's selling, beside a sweltering highway in Ghana's capital, costs me the equivalent of about 75 cents (60p).That's obviously not a lot…