Average values that contain text characters in cell

I want the AVERAGE function to be able to include cells which also contain the "<" character.
At the same time, I want cells containing the "<" character to use 50% of the reference value for purposes of the average calculation. I have attached an example of the output I'm seeking.

I would like for the solution to be a formula or array I can put into the calcuation cell without the need for dummy cells or off-page conversions or calculations. I can do that, using a single formula is what I'm struggling with.

One way:

=AVERAGE(IF(LEFT(B2:B13)="<",MID(B2:B13,2,10)*0.5,B2:B13))

confirmed with CTRL+SHIFT+EnTER not just ENTER