Problem 17-27 Joint Costs (LO 17-4, 17-5) [The following information applies to the questions displayed below.] Snake River Sawmill manufactures two lumber products from a joint milling process. The two products developed are mine support braces (MSB) and unseasoned commercial building lumber (CBL). A standard production run incurs joint costs of $430,000 and results in 73,000 units of MSB and 103,000 units of CBL. Each MSB sells for $7, and each unit of CBL sells for $9. oblem 17-27 Part 4 If Snake River Sawmill chose not to process the mine support braces beyond the split-off point, the contribution from the joint milling ocess would increase or decrease by what amount