Assume a face value of $10,000.

a. Calculate the ask price of the T-bill maturing on September 1, 2016, as of May 16, 2016.

b. Calculate the bid price of the T-bill maturing on November 10, 2016, as of May 16, 2016.

I got $9992.56 for a) but it says that answer is incorrect. Help please!

Bid 0.168 Asked 0.158 0.163 0.193 Asked Yield 0.160 0.165 Maturity 5/19/2016 5/26/2016 6/2/2016 6/9/2016 6/16/2016 6/23/2016 6/30/2016 7/7/2016 0.173 0.203 0.195 Chg -0.030 -0.055 -0.038 -0.038 0.028 -0.010 0.196 0.185 0.158 0.186 0.193 0.203 0.183 0.193 0.196 0.210 0.200 -0.010 0.203 0.208 0.198 -0.015 0.201 7/14/2016 0.215 0.205 0.209 -0.020 -0.023 0.223 0.226 0.233 0.245 0.235 -0.008 0.239 7/21/2016 7/28/2016 S/4/2016 8/11/2016 S/18/2016 0.255 0.245 0.249 -0.005 -0.020 0.255 0.245 0.249 0.255 0.245 -0.018 0.249 0.265 0.255 0.005 0.259 8/25/2016 9/1/2016 0.258 0.248 -0.015 0.252 9/8/2016 0.255 0.245 -0.015 0.249 0.253 0.003 0.263 0.278 0.268 0.270 0.250 -0.018 -0.013 -0.013 -0.005 0.257 0.272 0.274 0.297 0.303 0.317 0.293 0.303 0.308 0.298 0.323 0.313 -0.025 0.320 0.310 -0.025 0.315 9/15/2016 9/22/2016 9/29/2016 10/6/2016 10/13/2016 10/20/2016 10/27/2016 11/3/2016 11/10/2016 12/8/2016 1/5/2017 2/2/2017 3/2/2017 3/30/2017 0.338 0.328 0.333 0.345 0.341 0.335 0.340 0.350 0.346 -0.025 -0.025 -0.005 -0.005 0.003 -0.010 0.338 0.328 0.334 0.428 0.418 0.426 0.460 0.450 0.458 0.485 0.475 -0.013 0.484 4/27/2017 0.523 0.513 -0.010 0.522