How to sum data into a row in Microsoft Access?

Question

Microsoft Access

I need to automatically calculate the cost of one day of stay in foreign countries of a travel agency by summing the lines "Cost of accommodation", "Cost of meals", "Cost of excursion services", "Cost of other services" and filling in the last line. It is very important that the result is displayed in the "Cost of one day of stay" field, I do not need the output using the totals function in a column.