Answer:
$50,800
Explanation:
Security     Cost       Fair value     Gain(loss)
X              371,000    343,500        -27,500  
Y              185,000     162,400        -22,600  
Z              <u>424,000</u>    <u>407,800</u>        <u>-16,200	</u>
Total        <u>980,000</u>    <u>913,700</u>         <u>-66,300</u>
Unrealized holding loss on Income statement ended June 30,2021 = $66,300 - $15,500 = $50,800