Contribution question help!!!!

If anyone can help with this attached level 3 style question, it would be appreciated. It's really the bit where they are asking for the optical mix I am struggling with!

Alpha makes two products Tig and Tag, the info for the next month is as follows: Product Tig

Variable Costs:-

Material Costs (£400 per kilo) - 2400
Labour Cost - 400
Total variable cost 2800

Fixed costs:-

Production costs - 450
Admin Costs - 300
Total Fixed Costs - 750

Profit per unit - 450
Monthly Demand - 200

Product tag
Variable Costs:-
Material Costs (£400 per kilo) - 3000
Labour Cost - 600
Total variable cost - 3600
Fixed costs:-
Production costs - 450
Admin Costs - 300
Total Fixed Costs - 750

Profit per unit - 600
Monthly Demand - 300

a) Complete the following

The contribution per unit for

• Tig
• Tag

Total Contribution for:-

• Tig
• Tag
b) Optical production order for Tig and Tag
c) Optical production in units for Tig and Tag
d) Total contribution for Tig and Tag