The politicians’ letter to Ahold Delhaize CEO Frans Muller asked for an explanation on pricing discrepancies between Massachusetts locations.

The East Coast supermarket chain is also adding kiosks to stores that will allow customers to print coupons and activate deals.

Sam’s Club is opening a checkout counter-less store near Dallas while Costco is lowering prices on key items under its Kirkland Signature brand.

Bill Mayo, who joined the company earlier this year, is taking on additional responsibilities following Chief Merchandising and Marketing Officer Trey Johnson’s retirement.

The East Coast grocer was initially skeptical about linking with the online giant, but has reaped benefits including expanding its reach to more metro areas, the company’s CIO said.