SUM Cells With Same Content And Multiplied By Quantity Of Each?

Basically i need a formula that will look at the message content on a seperate sheet (Data sheet on the attached example) and multiple by the volume of the message type to return a value on a seperate sheet.

The problem i have is our messages appear in the data as seperate lines based on the entire message content, with a quantity of how many times that exact message was sent on a day DESPITE there being many variations of a message, they may all only equate to 1 or 2 actual message types.

In the example you will see the Data tab showing Example message 1, Example message 1.1 etc. All of the Example message 1-1.5 are actually the same message type (same applies to Example message 2) and i need to be able to have formula that groups and counts these to return a value by message type * by the quantity per day. So in the example, Example message 1 would return a result of 10 on the main sheet.