Comprehensive analysis December 31, 2007, balance sheet data for Slovensky Company follow. All accounts are represented. Amounts indicated by question marks (?) can be calculated using the following additional information.

Required Determine the following.

a. The balance in accounts receivable as of December 31, 2007.

b. The turnover of assets for 2007.

c. The balance of long-term debt as of December 31, 2007.

d. The balance in retained earnings as of December 2007.