You'd want replacement cost, so multiply each yard by $10. You can measure a stack or a stack in a tote, estimate the value of that, then measure the rest in terms of the size of the stack or tote that you estimated from, and just multiply. Lets say that one tote contains 35 fabrics. I know my fabrics are usually (or average) 1 yard, so that tote is $350. I have 10 more totes, plus stacks of fabric equal to 4 additional totes, so that's 15 x $350 = $5250, if I calculated correctly. Do the same type of thing for thread, embelishments, ....