I am looking for help with this general accounting question using proper accounting standards.

Mountain View Manufacturing began operations in 2022 and produced 180,000 units of its signature product. The variable manufacturing cost was $25 per unit. Fixed manufacturing costs totaled $720,000. Marketing and administrative expenses consisted of $240,000 fixed costs and $5 per unit variable costs. Mountain View sold 150,000 units at $45 per unit. What was Mountain View's operating income for 2022 under the variable costing method? a. $1,500,000 b. $2,550,000 c. $1,290,000 d. $1,830,000