Please provide some reasoning on how to arrive at the solution. Thank you!!

Compute the amount of raw materials were used during May if $70,000 of raw materials were purchased during the month and the inventories were as follows: Raw materials Work in process Finished goods May 1 $4,000 $13,000 $25,000 May 31 $8,000 $16,000 $27,000 Cost of raw materials used in May were