Final answer:
The spreadsheet will throw up an error when Luke types 'som' instead of 'sum' to calculate the total. 'Sum' is a function used in spreadsheets to add up a range of numbers.
Step-by-step explanation:
The spreadsheet will throw up an error when Luke types 'som' instead of 'sum' to calculate the total. The reason for this is that 'sum' is a function used in spreadsheets to add up a range of numbers.
For example, if Luke wanted to calculate the sum of the expenses in column A, he would write '=SUM(A1:A10)'. This formula would add up the values in cells A1 to A10 and display the total in the cell where the formula is entered.