Shower gel costs Abraham 4 shower gels * $4 = $<<4*4=16>>16.
So the shower gel and toothpaste combined have cost him $16 + $3 = $<<16+3=19>>19.
He had money remaining in his budget so the total cost of his shopping must have been $60 – $30 = $<<60-30=30>>30.
The box of laundry detergent therefore cost him $30 – $19 = $<<30-19=11>>11.
#### 11