National company has two support departments A&B and two operating departments X&Y. for the first quarter 2021, Budgeted overhead costs before any interdepartmental costs allocations were: A $800,000, B $1,500,000, X $5,000,000 and Y $11,000,000 Support work supplied by A to B 20%, to X 50% and to Y 30%. Support work supplied by B to A 25%, to X 35% and to Y 40%. Using step-down method and allocating department A cost first out of its cost the amount allocated to department Ais: O a. 50 O b. $160.000 O c $400,000 O d. $240.000