There were an average of 40 + 50 = <<40+50=90>>90 apples.
And, there were 30 + 40 = <<30+40=70>>70 oranges.
Thus, Wendy gained 90 x $1.50 = $<<90*1.5=135>>135 for selling apples.
And, she gained an additional 70 x $1 = $<<70*1=70>>70 for selling oranges.
Therefore, her total sales for the day is $135 + 70 = $<<135+70=205>>205.
#### 205