Final answer:
Wise company should recognize $240 in revenue during May.
Step-by-step explanation:
Wise company should recognize $240 in revenue during May. This is calculated by multiplying the number of calculators sold (8) by the selling price per calculator ($30). Therefore, 8 x $30 = $240. It is important to note that revenue is recognized when the sale is made, regardless of whether payment has been received or not.