MR1=100−Q1,
MR2=80−Q2, Set MR1=MR2=MC
C=6Q1+6Q2=6(Q1+Q2) Q1+Q2=Q
C=6Q
MC=6
MR1=6=>100−Q1=6
Q1=94
p1=100−94=6
MR2=6=>80−Q2=6
Q2=74
p2=80−74=6
Profits are the difference between the sum of the revenues generated in both market segments and the total cost of producing the output:
π=p1(MR1)+p2(MR2)−C
π=6(6)+6(6)−6(6+6)=0
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