I'd make a VLOOKUP table and then your mappings like so:
Sheet1
<TABLE style="PADDING-RIGHT: 2pt; PADDING-LEFT: 2pt; FONT-SIZE: 8pt; FONT-FAMILY: Arial,Arial; BACKGROUND-COLOR: #ffffff" cellSpacing=0 cellPadding=0 border=1><COLGROUP><COL style="FONT-WEIGHT: bold; WIDTH: 30px"><COL style="WIDTH: 56px"><COL style="WIDTH: 56px"><COL style="WIDTH: 56px"><COL style="WIDTH: 56px"><COL style="WIDTH: 56px"></COLGROUP><TBODY><TR style="FONT-WEIGHT: bold; FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center"><TD> </TD><TD>A</TD><TD>B</TD><TD>C</TD><TD>D</TD><TD>E</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">1</TD><TD style="TEXT-ALIGN: right">10</TD><TD style="TEXT-ALIGN: right">1000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32410</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">1000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">2</TD><TD style="TEXT-ALIGN: right">20</TD><TD style="TEXT-ALIGN: right">2000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32420</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">2000</TD></TR><TR style="HEIGHT: 18px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">3</TD><TD style="TEXT-ALIGN: right">30</TD><TD style="TEXT-ALIGN: right">3000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32430</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">3000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">4</TD><TD style="TEXT-ALIGN: right">40</TD><TD style="TEXT-ALIGN: right">4000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32440</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">4000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">5</TD><TD style="TEXT-ALIGN: right">50</TD><TD style="TEXT-ALIGN: right">5000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32450</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">5000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">6</TD><TD style="TEXT-ALIGN: right">56</TD><TD style="TEXT-ALIGN: right">6000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32456</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">6000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">7</TD><TD style="TEXT-ALIGN: right">57</TD><TD style="TEXT-ALIGN: right">7000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32457</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">7000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">8</TD><TD style="TEXT-ALIGN: right">58</TD><TD style="TEXT-ALIGN: right">8000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32458</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">8000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">9</TD><TD style="TEXT-ALIGN: right">59</TD><TD style="TEXT-ALIGN: right">9000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32459</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">9000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">10</TD><TD style="TEXT-ALIGN: right">60</TD><TD style="TEXT-ALIGN: right">10000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32460</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">10000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">11</TD><TD style="TEXT-ALIGN: right">61</TD><TD style="TEXT-ALIGN: right">11000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32461</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">11000</TD></TR><TR style="HEIGHT: 19px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">12</TD><TD style="TEXT-ALIGN: right">62</TD><TD style="TEXT-ALIGN: right">12000</TD><TD> </TD><TD style="TEXT-ALIGN: right">32462</TD><TD style="BACKGROUND-COLOR: #ccffff; TEXT-ALIGN: right">12000</TD></TR></TBODY></TABLE>
<TABLE style="FONT-SIZE: 10pt; BORDER-LEFT-COLOR: #00ff00; BORDER-BOTTOM-COLOR: #00ff00; COLOR: #000000; BORDER-TOP-STYLE: groove; BORDER-TOP-COLOR: #00ff00; FONT-FAMILY: Arial; BORDER-RIGHT-STYLE: groove; BORDER-LEFT-STYLE: groove; BACKGROUND-COLOR: #fffcf9; BORDER-RIGHT-COLOR: #00ff00; BORDER-BOTTOM-STYLE: groove"><TBODY><TR><TD>Spreadsheet Formulas</TD></TR><TR><TD><TABLE style="FONT-SIZE: 9pt; FONT-FAMILY: Arial" cellSpacing=0 cellPadding=2 border=1><TBODY><TR style="FONT-SIZE: 10pt; BACKGROUND-COLOR: #cacaca"><TD>Cell</TD><TD>Formula</TD></TR><TR><TD>E1</TD><TD>=VLOOKUP(RIGHT(D1,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E2</TD><TD>=VLOOKUP(RIGHT(D2,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E3</TD><TD>=VLOOKUP(RIGHT(D3,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E4</TD><TD>=VLOOKUP(RIGHT(D4,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E5</TD><TD>=VLOOKUP(RIGHT(D5,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E6</TD><TD>=VLOOKUP(RIGHT(D6,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E7</TD><TD>=VLOOKUP(RIGHT(D7,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E8</TD><TD>=VLOOKUP(RIGHT(D8,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E9</TD><TD>=VLOOKUP(RIGHT(D9,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E10</TD><TD>=VLOOKUP(RIGHT(D10,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E11</TD><TD>=VLOOKUP(RIGHT(D11,2)+0,$A$1:$B$12,2,0)</TD></TR><TR><TD>E12</TD><TD>=VLOOKUP(RIGHT(D12,2)+0,$A$1:$B$12,2,0)</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>