Enterprise value = Market value of equity + Debt - Cash
Market value of equity = 8 million × $15 = $120 million
Debt = Notes payable + Current maturities of long-term debt + Long-term debt
Debt = 9.6 + 36.9 + 168.9 = 215.4
Cash = 58.5
So, enterprise value = $120 + 215.4 - 58.5 = $276.90.