One hundred pounds of raw material W is processed into 60 pounds of X and 40 pounds of Y. Joint costs are $135. X is sold for $2.50 per pound, and Y can be sold for $3.00 per pound or processed further into 30 pounds of Z (10 pounds are lost in the second process) at an additional cost of $60. Each pound of Z can then be sold for $6.00. What is the effect on profits of further processing product Y into product Z?