Answer and Explanation:
The computation is shown below:
(a) Income from Operation is 
= Sales Revenue - COGS - Selling & admin exp 
 = $291,980 - $128,220 - $51,800 
= $111,960 
 (b) Net Income is 
 = Sales Revenue - COGS - Selling & admin exp + Gain on sales of assets - Interest exp - Loss on Discontinued Operations 
 = $291,980 - $128,220 - $51,800 + $27,190 - $5,700 - $12,550 
= $120,900 
 (c) Comprehensive Income is 
= Net Income + Unrealized gain on available for sale investments 
 = $120,900 + $10,240 
= $131,140 
 (d) Retained earning ending balance is
 = Net Income - Dividends declare & paid 
 = $120,900 - $4,600 
= $116,300