please explain with detail thank you and fast!

Marionette Company manufactures dolls that are sold to various distributors. The company produces at full capacity for six months each year to meet peak demand, the manufacturing facility operates at 70% of capacity for the other six months of the year. The company has provided the following data for the year. No. of units produced and sold 600,000 units Sales price $30 per unit $10 per unit $1,000,000 per year Variable manufacturing costs Fixed manufacturing costs Variable selling and administrative costs Fixed selling and administrative costs $5 per unit $500,000 per year Marionette receives an offer to produce 7000 dolls for a special event. This is a one-time opportunity during a period when the company has excess capacity What is the minimum sales price the company should accept for the order