Watch
Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
20 checks since Aug 20 · $49.98–$84.98
$75.48
$25.50 above lowest
Price as of Sep 20, 2026, 12:47 p.m. EDT. Prices and availability change.
Office
Calculated Industries 4225 Concrete Calculator
Also works as a standard calculator Fast, accurate estimates Quick conversions
$107.51
At the September 20 check, the price was $107.51, against a recorded range of $105.57 to $115.66 across 103 checks since July 24.
Near best price · Checked 2026-09-20
Price as of Sep 20, 2026, 3:47 a.m. EDT. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.ca at the time of purchase will apply to the purchase of this product. As an Amazon Associate I earn from qualifying purchases.Prices and availability change.
Price history
This is Dipp's observed history, not every price ever offered on Amazon.ca.
Recorded price checks
The latest observations Dipp has stored for this product. These are periodic checks, not a record of every price Amazon displayed.
| Checked | Price |
|---|---|
| Sep 19, 2026, 6:47 p.m. | $107.51 |
| Sep 19, 2026, 3:47 a.m. | $107.81 |
| Sep 18, 2026, 1:47 p.m. | $107.81 |
| Sep 18, 2026, 3:48 a.m. | $107.28 |
| Sep 17, 2026, 1:48 p.m. | $107.28 |
| Sep 16, 2026, 11:48 p.m. | $107.28 |
| Sep 16, 2026, 8:48 a.m. | $106.56 |
| Sep 15, 2026, 7:47 p.m. | $106.56 |
| Sep 15, 2026, 4:47 a.m. | $106.56 |
| Sep 14, 2026, 2:48 p.m. | $106.56 |
| Sep 14, 2026, 2:48 a.m. | $105.90 |
| Sep 13, 2026, 1:47 a.m. | $105.90 |
No email needed. Dipp picks the threshold from the recorded history.
More in Office
Other office prices Dipp is tracking
Nearest prices in this category, so today’s number has something to sit against.
−15%
Casio fx-CG100 ClassWiz® Color Graphing Calculator with 3D Graph & Python | Large High-Res Display, Basic & Advanced Functions | Ideal for Exams, STEM, Programming & Advanced Math
97 checks since Jul 24 · $139.99–$169.99
$139.99$164.99vs Dipp typical
Lowest seen · 15% below typical
Price as of Sep 20, 2026, 9:47 a.m. EDT. Prices and availability change.
Watch
Texas Instruments TI-30X IIS 2-Line Scientific Calculator, Black with Blue Accents
119 checks since Jul 26 · $18.99–$23.99
$23.27
$4.28 above lowest
Price as of Sep 20, 2026, 8:47 a.m. EDT. Prices and availability change.
Watch
Sharp EL546XTSL Advanced Scientific Calculator with 470 Functions, 2-Line LCD Display, Solar & Battery Power, D.A.L. Display, Equation Solver, Matrix & Statistics Calculator
122 checks since Jul 24 · $17.60–$41.61
$19.99
$2.39 above lowest
Price as of Sep 20, 2026, 12:48 p.m. EDT. Prices and availability change.
−20%
Texas Instruments TI-30XIIS Scientific Calculator, White
98 checks since Jul 24 · $15.99–$26.55
$19.99$24.99vs Dipp typical
20% below typical
Price as of Sep 20, 2026, 9:48 a.m. EDT. Prices and availability change.
Watch
Post-it Super Sticky Notes, 3 x 3 in, , 5 Pads, 90 Sheets/Pad
26 checks since Sep 7 · $10.64–$13.66
$13.45
$2.81 above lowest
Price as of Sep 20, 2026, 10:47 a.m. EDT. Prices and availability change.
Where this sits
Where this sits in Dipp's Office catalogue
The wider Office catalogue on Amazon.ca, each product with its own recorded price history.
- Amazon.ca office deals in Canada — today’s verified drops across the category
- How Dipp records prices and decides what counts as a deal — what the history above is, and is not