The finance team has created budget forecasts for Crown Hotel based on carefully researched factors for the last 3 years and these were always very accurate. The recent budget which included all departments of the hotel was implemented 3 months ago and the forecasted figures for Food Cost and COGS/Beverages in both the Restaurant and the Bar Operations have blown out by nearly 4.5 percent.

What could be the reasons for this? List 5 examples of areas you would investigate and explain why.