Keith Inc, has 4 product lines: sour cream, ice cream, yogurt, and butter. Demand of individual products is not affected by changes in other product lines. 30% of the fixed costs are direct, and the other 70% are allocated. Results of June follow: Prepare an incremental analysis of the effect of dropping the sour cream product line. (Enter negotive amounts using either a negative sign preceding the number eg. 45 or porentheses e.g. (45).)