I am Having trouble figuring out how to map this question.

Decrease inmaterials inventory $2,700

Materials inventory on Feb. 28 50% of materials inventory on Jan. 31

Direct materials purchased $12,300

Direct materials used 3 times the direct labor incurred

Total manufacturing costs incurred in period $28,700

Total manufacturing costs incurred in period 70% of Cost of Goods Manufactured

Total manufacturing costs incurred in period $7,000 less than Cost of Goods Sold

I am supposed to find:

Account Balances

Account Jan. 31 Feb. 28 Costs Incurred

Materials Inv. _______ _______ Direct Mats. Used ________

WIP Inv. 21,000 _______ Direct Labor Incurred ______

Finished Good Inv. ______ 16,000 Factory OH Incurred _______

Cost of Goods Sold _______

Not wanting specific answers just a how to.