Answer:
=IF(D15<1500, "Discontinue", "No Change")
Explanation:
Assuming that this is excel, you can locate the cell F15 and input the IF function. The formula for IF function is
IF(<condition>, <action if true>, <action if false>)
So before the 1st comma, we place the condition which is D15 < 1500
In the middle, before the 2nd comma, we place the text to display if D15 is less than 1500, which is "Discontinue".
In the last place, we place the text to display if D15 is greater than or equals to 1500, which is "No Change"
So the overall formula is =IF(D15<1500, "Discontinue", "No Change")