How much does this cost to the nearest dollar?

QSA Adapter - 40G QSFP+ to 10G SFP+ Converter Module for Mellanox Dell Nokia Juniper, Arista, H3C, Extreme and More.
Wide Compatibility This adapter supports all SFP+ optics and cable (except Cisco) reaches, such as 10G SFP+ Copper Cable and 10G SFP+ Active Optical Cable. I2C read port information comes from SFP port module, not QSA Module. Smooth Speed Migration 10Gtek QSA adapter Module offers 10 Gigabit Ethernet connectivity for QSFP-only platforms. It allows smooth and cost-effective migration to 40 Gigabit Ethernet by providing an option to use lower-speed. Convenient and Flexible Use With QSA adapter, you can flexibly use any SFP+

Price is $52.00

Price: $51.99