The estimated annual water cost for the Perricone family= $1,132,305
The family meter reading for last month = 3,970 Tgal
The family meter reading for next month= 3,973 Tgal
The rate charged by the supplier = $23.75 per Tgal.
There is increase in the meter reading per month by 3Tgal.
To calculate for the monthly cost = 23.75 × 3,970
= $94287.5
Therefore annually= $94287.5 × 12 = $1,131,450
The cost for each monthly increase = 23.75 × 3= $71.25
Therefore annual monthly increase= 71.25× 12= $855
Therefore, the estimated annual water cost for the Perricone family= $1,131,450 + $855
= $1,132,305
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