→Amount charged by wireless service provider when 'm' messages are sent=$(30+0.10 m)
Amount charged if ' 1 ' messages are sent= $30+0.10×1=$30.10
Amount charged when '2' messages are sent=$30+0.10×2=%30.20
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Amount charged or money you will pay when 'u' messages are sent=$30+0.10×u=$(30+0.10 u)
