Could you please help me make these natural?<br/><br/>1 That's too little a tip. <br/><br/>2 20 dollars is one day's food/worth of food.<br/><br/>3 She's the only one who understands what that means. It's an inside joke.<br/><br/>4 The voucher you handed me doesn't look like a voucher this company. This company's vouchers look different.<br/><br/>Thank you