Answer:
$690
Step-by-step explanation:
Tyrovia produces only two products which are guns and butter
In 2009, 80 guns were produced at $4 and 40 butter was produced at $3
In 2018, 90 guns were produced at $5 and 40 butter was produced at $10
Therefore the real GDP for Tyrovia in 2009 using 2018 as the base year can be calculated as follows
= $90×5 + 60×4
= $450 + $240
= $690
Hence the real GDP for Tyrovia is $690