Pinnacle Engineering Corporation has a contract with QStop Mart Stores to provide customized software for QStop's inventory control system. Retail Outlets, Inc., QStop's competitor, induces Sam, a Pinnacle subcontractor who is writing code for the QStop software, to delay delivery of the code for one week. As a result, Pinnacle's delivery of the software is delayed, and QStop sustains $500,000 in lost profits. On what ground could QStop recover damages from Retail Outlets?