How much does this cost to the nearest dollar?

2GB SODIMM Memory RAM Upgrade for The Acer Aspire 5100, 5315, 5515 and 5516 Notebook Laptops
Your computer only supports modules made with a specific type of chip. Should you find what seems to be the exact same memory elsewhere for a lower price, be sure to double check that the model number matches exactly and the vendor is selling a quality part. When you purchase memory from it comes with a lifetime warranty, fast, telephone technical support by USA-based technicians and a quality product that our company stands behind. RAM 2 GB DDR2, Memory Speed 667, Brand model number Weight 0.353 ounces, Dimensions 3.15 x 1.73 x 0.31 inches, Computer Memory Type SODIMM

Price is $31.00
Price: $31