Declare all constants (cost of electricity, BPA charge, municipal tax, state public utility tax, and any others). This should be done in the Invoice class. ? Declare meter readings and total kW used as integers. Use input validation for both type and range (e.g., previous reading should not exceed present, no negative values, etc.). ? Calculate cost of electricity with nested if statements as follows: o If total units used

o Else if total units used

ect #2 File Help Clear Puget Sound Energy Invoice CS& 141 Meter Readings Invoice Date Print Form OMISH COUNTY Present 62370 Jun 22, 2022 Print Invoice Print GUI form Quit Previous 62014 Account # TILITY DISTRICT NO. 1 Total Units 356 8451-2378-9 Snohomish County PUD P.O. Box 1100 Everett, WA 98206-1100 www.snopud.com 425-731-1000 Name Kahte Lamb Address 20000 68th Avenue West City Lynnwood State WA Zip 98036-1348 Customer Kahte Lamb Display Bill Cost of Electricity BPA Charge $27.64 $0.49 State Public Utility Charge $1.07 City Tax $1.66 Print Invoice Total $30.86 Clear Quit Thank you for being our customer!