Answer:
1. The Value of a levered firm can be calculated using WACC which means that if you have the Value, you can compute WACC.
The formula is;
Value of leveraged firm = Free cash-flow/ (WACC - Growth rate)
Value of leveraged firm = Value of Equity + Value of Debt
= 100 + 40
= $140 million
Value of leveraged firm = Free cash-flow/ (WACC - Growth rate)
140 = 7 ( WACC - 3%)
140 * WACC - 4.2 = 7
WACC = 0.08
= 8%
2. Interest tax shield = Value of leveraged firm - Value of unleveraged firm
Value of unleveraged Firm = Free Cash Flow/ WACC before tax - Growth rate
WACC before tax = WACC + (Debt/(Debt + Equity))*Cost of Debt*(Tax Rate)
= 8% + (40/ 140) * 7.5%(35%)
= 8.75%
Value of unleveraged Firm = Free Cash Flow/ WACC before tax - Growth rate
= 7 /( 8.75% - 3%)
= $121.74 million
= $122 million
Interest tax shield = Value of leveraged firm - Value of unleveraged firm
= 140 - 122
= $18 million