Column 1: 579 + 360 + 412 = 1351

Here are the answers for each row and column:

• Row 1: Column 1: $579 + 360 + 412 = \boxed{\text{1351}}$ Column 2: $338 + 671 - 902 = \boxed{\text{107}}$ Column 3: $946 + 527 + 301 = \boxed{\text{1774}}$ Column 4: $726 - 334 + 819 = \boxed{\text{1211}}$ Column 5: $690 + 683 + 236 = \boxed{\