a.)

Calculation of Budgeted profits at actual units sold that is 5400
	Particulars	Details	Amount(in)
	Sales	5400units *5 per unit	27000
	Material	5400*0.5kg*3per Kg	8100
	Labour	5400*(7.5/60)*10	6750
	Fixed Overheads	5400*1.2	6480
	Budgeted Profits		5670

Reconcilation of budgeted profits with actual profits
		Particulars	Amount
		Budgeted Profits	5670
		Less: Unfavourable sales price variance	-540
		Less: Unfavourable material yield variance	-390
		Less: Unfavourable material price variance	-280
		Add: Favourable labour efficiency variance	250
		Less: Unfavourable labour rate variance	-385
		Add" favourable fixed overhead variance	130
		Actual Profits	4455

The answer is given, can you please explain in details how each variance such as favorable and adverswe are calculated.