26. on december 31, 2018, blais industries had long-term debt totaling $120,000 on their balance sheet. during 2019, they paid $10,000 in interest on that debt and $50,000 in principal. during the year they also issued new long-term debt totaling $20,000. what is the balance in their long-term debt account at the end of 2019? $80,000 $90,000 $100,000 $140,000