Abraham owns 80 square meters of unused land. He sold half of the land for $50, and after a month, he sold another 1/4 of his land for $30. He then sold the remaining land for $3 per square meter. How much money will he be able to earn after selling all his unused land?
Abraham sold 1/2 x 80= 
<gadget id="calculator">1/2*80</gadget>
<output>40</output>
40 square meters of his unused land.
After a month, he sold 1/4 x 40 = 
<gadget id="calculator">1/4*40</gadget>
<output>10</output>
10 square meters of his land.
So, the total land he already sold is 40+10= 
<gadget id="calculator">50</gadget>
<output>50</output>
50 square meters of his land.
He has 80 - 50 = 
<gadget id="calculator">80-50</gadget>
<output>30</output>
30 remaining land to be sold at $3 per square meter.
So he earned $3 x 30 = $
<gadget id="calculator">3*30</gadget>
<output>90</output>
90 for that land.
Therefore, he earned a total of $50 + $30 + $90 = $
<gadget id="calculator">50+30+90</gadget>
<output>170</output>
170.

<result>170</result>