Pattern stitch count seems off
The previous row ends with -38 sts.
Then the pattern says:
"Working in Stockinette st, inc 1 st every 3 inches 5 times -48 sts."
By my calculations, inc 1 st every 3 inches 5 times, would only add 5 sts, but the pattern goes from 38 to 48.
Am I reading this wrong? Is the pattern wrong? (This is for a sleeve of a sweater)