Earnings before interest, taxes, depreciation, and amortization $($EBITDA$)$ $ $90$ $ $110$ $ $125$ $ $130$

Depreciation $10202530$

Pretax profit $8090100100$

Tax at $30\%24273030$

Investment $19222527$

From year $5$ onward, EBITDA, depreciation, and investment are expected to remain unchanged at year$-4$ levels. Laputa is financed $40\%$ by equity and $60\%$ by debt. Its cost of equity is $12\%,$ its debt yields $7\%,$ and it pays corporate tax at $30\%.$