Barnes Building Systems made the following closing entries at the end of a recent year:
a. Income Summary ........ 384,300
Retained Earnings ..... 384,300
b. Retained Earnings ....... 35,000
Dividends ......... 35,000
c. Sales Revenue ........425,700
Income Summary ..... 425,700
d. Income Summary ....... 104,100
Interest Expense ...... 104,100

Required:
1. What was Barnes’s net income?
2. By how much did Barnes’s retained earnings change?
3. If the sales revenue identified in entry c was Barnes’s only revenue, what was the total amount of Barnes’s expenses?