Chapter 4.7, Problem 41E

Four sectors. An economy is based on four sectors, agriculture $\left(A\right)$, energy $\left(E\right)$, labor $\left(L\right)$. and manufacturing $\left(M\right)$.The table gives the input requirements for a dollar's worth of (in billions of dollars) for a $3$ -year period. Find the output from each sector that is needed to satisfy a final de- for each sector that is needed to satisfy each of these final demands. Round answers to the nearest billion dollars.