What is the total direct material price variance (to the nearest whole number)?

Refer to the Exhibit.

Fabex Ltd manufactures a household detergent called "Clear".

The standard data for one of the chemicals used in production (chemical XTC) is as follows:

(a) 50 litres used per 100 litres of ‘Clear’ produced

(b) Budgeted monthly production is 1000 litres of ‘Clear’.

The closing inventory of chemical XTC for November valued at standard price was as follows:

Actual results for the period during December were as follows:

(a) 500 litres of chemical XTC was purchased for £1300.

(b) 550 litres of chemical XTC was used.

(c) 900 litres of ‘Clear’ was produced.

It is company policy to extract the material price variance at the time of purchase.

What is the total direct material price variance (to the nearest whole number)?
A . £50 adverse
B . £50 favourable
C . £55 adverse
D . £55 favourable