Read matrix grid

Hi everyone, I have a problem with the code to read a matrix grid in vb.net. Actually I need a sample source code to read matrix grid below.

	610	710	810	910	1010	1110	1210	1310
600	76	91	106	121	136	151	166	181
700	86	101	116	131	146	161	176	191
800	96	111	126	141	156	171	186	201
900	106	121	136	151	166	181	196	211
1000	116	131	146	161	176	191	206	221

width columns value

610,710,810,910,1010,1110,1210,1310

drop rows value

600,700,800,900,1000

The logic is if I write 610 for width and 600 for drop, the result price would be $76. And if I write 680 for width and 890 for drop, the result would be $121. I appreciate for everyone who kind to help me for this. Best Regards, Tedi