A company uses marginal costing. The following variances occurred in the last period when the actual net profit was $80,000. Materials $1,800 adverse Labour $2,000 favourable Overheads $1,400 adverse Sales price $1,000 favourable Sales volume contribution $1,800 favourable What was the budgeted net profit for the last period? a. $81,600 O b. $83,000 O c. $77,000 O d. $78,400