To create data validation for the highlighted fields in yellow:
For cell C7, select the cell and go to the Data Validation option in the Data tab. In the Settings tab, choose "List" under Allow, and in the Source field, enter the options for hotel room types (Studio, 1 BR, 2 BR & Penthouse) separated by commas. In the Input Message tab, enter a message to inform the user about the available options. In the Error Alert tab, select "Stop" and enter an error message to inform the user to choose a valid option.
For cell C11, select the cell and go to the Data Validation option in the Data tab. In the Settings tab, choose "Whole Number" under Allow, and in the Data field, choose "between" and enter the minimum (2) and maximum (14) number of nights stayed. In the Input Message tab, enter a message to inform the user about the valid range of values. In the Error Alert tab, select "Stop" and enter an error message to inform the user to enter a value within the valid range.
For cell G7, select the cell and go to the Data Validation option in the Data tab. In the Settings tab, choose "List" under Allow, and in the Source field, enter the options for customer status in the rewards program (None, Silver, Gold) separated by commas. In the Input Message tab, enter a message to inform the user about the available options. In the Error Alert tab, select "Stop" and enter an error message to inform the user to choose a valid option.
To enter the values in the spreadsheet:
Select the cells J7, K7, L7, J12, J13, J14, J15 and enter the values as instructed.
Note: Make sure to save your spreadsheet and test the data validation and error alerts by entering invalid or out-of-range values.