further variance

a company manufactures a single product. An extract from a variance control report together with relevant standard cost data is shown below. standard s.p per unit $70 Standard d.m cost(5kg * $2per kg) $10 per unit Budgeted total material cost of sales $2300 per month budgeted profit margin $6900 per month Actual results sales revenue $15200 Total direct material cost $2400 DMPV $800 adverse DMUV $400 favourable no change in inventory levels Q1 what was the actual production in february?? A 200 B 217 C 240 D 280 Q2 what was the actual usage of direct material during february?? A 800kg B 1000 C 1200 D none of these Q3 what was the SPV for february?? A $120F B 900A C1200A D1200F Q4 what was the sales volume profit variance?? A$900F B1200F C900A D2100A i'm having difficulties with the workings :/