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| // Find all of the boxes with totals | |
| $$('.wht_total') | |
| // Take off the $ and turn it into a number (instead of a word made out of digits) | |
| .map(el => Number(el.innerText.slice(1))) | |
| // Remove any that aren't numbers (the "Total" at the top is included) | |
| .filter(n => !isNaN(n)) | |
| // Add everything together | |
| .reduce((t, c) => t+c) |
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