Jan, Kate, Mike, and Sam have lots of shells and many pails. They put groups of 10 shells in each pail.
 Kate has 2 pails and 3 more shells left over.
 Sam has 1 more pail than Kate, but no shells left over.
 Jan has 4 more shells than Sam.
 Kate has 2 more shells than Mike.
How many shells does each have?
