NOVOMAT manufactures and sells a single product from a single raw material. In its production budget, the company had planned to manufacture 1,200 units of this product for May. According to the previously observed consumption, when using its usual supplier, it had planned that manufacturing each unit of the product would consume 5 kg of raw material at 7.30 per kg. That is, the cost of raw material is 36.50 per unit of the product. In fact, the company produced 1,100 units in May. It used a new supplier and consumed 5,800 kg of raw material for 40,600.

QUESTION: Calculate the total raw material variance for May and break it down into sub-variances. How do you interpret the results of your calculations? Do you recommend keeping the new supplier?