please help fill in the blanks using javascript

Brianna Watt, a consultant doing business as Watt Gives, wants a program to create an invoice for consulting services. Normally, she works on a project for three days before sending an invoice. She writes down the number of hours worked on each day and needs a program that asks for these amounts, totals them, and multiplies the amount by her standard rate of $30 per hour. The invoice should include Brianna's business name, the client's business name, the total number of hours worked, the rate, and the total amount billed. The information will be displayed onscreen. clientName = ("Enter client's name"); businessName = rate= day1 ("Hours worked on day 1")); day2 - ("Hours worked on day 2")); day3 ("Hours worked on day 3"; totalHours - totalCharge ("Brianna Watt DBA ("Invoice for ); ("Hours:" + ): ("Rate:" + ); ("Total:" + 1): Expected Output: >> Brianna Watt DBA Watt Gives >>Invoice for Grunge Inc. >>Hours: 20 >>Rate: 30 >>Total: 600