A restaurant has the following 12 month record of sales and wages cost. Adjust to the base information shown: Included in the July wages is a lump-sum retroactive wage increase of $1,800,

which would not normally be part of the July wage cost. Also, in December, the restaurant catered a special Christmas function that bought in $3,400 in sales revenue, and

cost the restaurant and additional $900 in wages. The December wage figure also included $1,400 in Christmas bonuses to the staff. Use the high-low method to calculate the

restaurant's monthly fixed wage costs.

Sales