said on Tuesday it is investing $300 million to refubish 1,100 restaurants and add self-order kiosks - meaning more than 6,000 outlets will have them.It is the latest stage of the fast food chain's bid to revamp outlets and cut costs - with kiosks potentially leading to fewer staff and lower wage expenses.The announcement on Tuesday came as Burger King reported higher-than-expected US sales in the first three months of the year - suggesting that initial efforts to modernize are paying off.
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